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Brentford's first Premier League signing saw 23-year-old Nigerian midfielder Frank Onyeka join from FC Midtjylland.

"We think he's a strong addition to the squad," said Bees boss Thomas Frank. "We are looking forward to working with him. He is a very dynamic player."

Onyeka has made one appearance for his country but could be selected for Nigeria for the Africa Cup of Nations, which starts in January 2022.

The Bees tend not to make many mistakes in the market. Will Onyeka prove to be another masterstroke?

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Albert Sambi Lokonga represents another youthful recruit for Arsenal, who are reported to have parted with around £17m for the Belgium Under-21 international.

Lokonga, 21, joined Anderlecht at 15, made his first-team debut in December 2017, and has gone on to make 78 appearances, scoring three goals.

Arsenal boss Mikel Arteta says his former Manchester City colleague Vincent Kompany - now boss at Anderlecht - sings Lokonga's praises, with Gunners technical director Edu adding that the club beat a host of other clubs to his signing.

It all sounds very positive.

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Crystal Palace's drive to recruit young, exciting players with plenty of scope for development continued with the signing of Marc Guehi from Chelsea.

The 21-year-old has had two loan spells at Swansea after coming through Chelsea's youth system, during which he helped the Swans reach the Championship play-offs.

If he can continue to improve and build on his clear promise then Chelsea's loss could very much prove to be Palace's gain.

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Leicester have a crop of talented full-backs, but most are right-footed, making left-back Ryan Bertrand look a very astute signing from Southampton.

They have not paid a fee and have acquired a very experienced defender with a Champions League winners medal in his collection and seven seasons of regular first-team football at St Mary's under his belt.

At 31, he still has a fair few campaigns in him yet to do the business while Luke Thomas develops.

Read more here.

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As soon as it became clear Rui Patricio was heading to Roma, Wolves knew they needed a new number one. They will hope they have found a man that can continue the fine work of his fellow Portuguese over the last few seasons.

Sa made 124 appearances during three seasons at Greek Super League champions Olympiakos, helping them win two league titles. He also spent time working under new Wolves manager Bruno Lage in Benfica's youth set-up.

A good replacement for Rui Patricio?

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Norwich's summer recruitment drive continued with the signing of French midfielder Pierre Lees-Melou from Nice for about £3.5m.

The 28-year-old made 29 league appearances for Nice last season, scoring four goals, as they finished ninth in Ligue 1.

"He's a really good technical player and is very good with the ball," said Norwich City manager Daniel Farke. "He also has the physical ability every game to cover lots of ground and can play many positions and roles."

Sounds a decent deal all round then, right?

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Arsenal's first signing of what is expected to be a busy summer saw left-back Nuno Tavares join from Benfica for a fairly modest £8m.

He made 25 first-team appearances for the Lisbon club and has also been capped for Portugal Under-21s. He also played against the Gunners last season in the Europa League and clearly impressed.

At 21 he fits the profile of an up and coming player with room to develop. Will it prove shrewd business for an Arsenal side looking to remodel itself after missing out on European football?

Read more here.

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France Under-21 international Rayan Ait-Nouri spent last season on loan at Molineux, making 24 appearances, scoring one goal and impressing sufficiently to ensure a five-year deal was a formality this summer.

He became Wolves' third signing of the summer as new boss Bruno Lage looks to forge his own way after replacing Nuno Espirito Santo.

At just 20 years of age, Ait-Nouri has time on his side to develop but will also be competing here and now for the left-back spot with Jonny and Marcal.

Read more here.

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Along with the capture of Peter Etebo, Watford also confirmed the capture of striker Joshua King on a free transfer in early July.

With no fee involved, this could prove to be a decent bit of business by the Hornets for a player who saw his playing time limited at Everton last season but had enough pedigree to have a few big clubs looking at signing him from Bournemouth after they were relegated two summers ago.

At 29, the Norway international still has plenty to offer. Watford will hope it can be the kind of form that twice saw him score 12+ Premier League goals for the Cherries.

Read more here.

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It would be fair to say that Nigeria international Peter Etebo's move to Stoke has not gone entirely to plan. Since joining for £6.35m in 2018, the summer after the Potters were relegated to the Championship, he has been out on loan thee times, including this temporary switch to Watford.

At 25, he still has time on his side and is versatile enough to play across midfield. Having played 24 times for Galatasaray last season, can he now prove his worth in the Premier League?

Read more here.

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Having signed Eberechi Eze from QPR last summer and been rewarded with a fine debut season from the midfielder, Crystal Palace have returned somewhat to the well to pick up another exciting midfield talent from a Championship London club.

Olise, 19, is Patrick Vieira's first signing since becoming Palace manager and arrives having played a major role for the Royals last season, scoring seven goals in 46 games. He was also named EFL Young Player of the season.

With Eze currently injured, he is also a timely addition to Palace's creative attacking options. Can he make the step up, though?

Read more here.

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Another exit from the Nou Camp, as Barcelona look to rectify their financial situation., external

Leeds have long required a specialist left-back with both the uber-versatile Stuart Dallas (now more of a central midfielder) and Ezgjan Alioski (now departed) filling the spot last season.

Former Spain Under-21 international Junior Firpo impressed at Real Betis but struggled to get regular football at Barca, with Jordi Alba in front of him in the pecking order.

If the 24-year-old can rediscover his Betis form at Elland Road, the Whites could have a player on their hands.

Read more here.

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Enock Mwepu is the second notable arrival to the Premier League from Red Bull Salzburg and the second Zambian to do so from the same club after Patson Daka joined Leicester.

The 23-year-old scored 11 goals in 81 league appearances and won four titles in four seasons with the Austrian club and while principally a central midfielder, he has the versatility to play wide right too.

With transfer rumours swirling, it remains to be seen if Mwepu will play alongside Yves Bissouma or possibly replace him in the Albion side?

Read more here.

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Barcelona's financial issues are well documented and it looks as though Wolves may be one the beneficiaries.

Francisco Trincao was not a regular in Barca's side last season, but still made 28 league appearances, scoring three goals and providing two assists, and seven Champions League outings. He is quick, direct and at 21 has plenty of time on his side to improve.

It is a loan deal to start with but includes a "a non-compulsory option to buy" at the end of the season. Win-win, right?

Read more here.

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Billy Gilmour's stock is sky high, especially in the United Kingdom, after his impressive display for Scotland against England at Wembley in Euro 2020.

The 20-year-old has senior appearances for Chelsea under his belt but with the likes of Jorginho, Mateo Kovacic and N'Golo Kante ahead of him in the Stamford Bridge central midfield pecking order, the Blues clearly feel his development is best served with regular football elsewhere.

Enter newly-promoted Norwich, who have a gap to fill in the middle and a progressive manager looking to give Gilmour the chance he needs to shine.

Read more here.

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Jack Harrison is technically a new signing for Leeds, but in truth the winger has been a key member of Leeds' squad for the last three seasons courtesy of a number of loan deals with Manchester City.

Officially undisclosed, but reported to be around £11m, the fee represents good value for money for the Whites if the 24-year-old can build on his impressive debut season in the Premier League.

The Englishman scored eight goals and registered eight assists in 36 league appearances last season.

Read more here.

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Let's be honest, with Dean Henderson and David de Gea at Old Trafford, Tom Heaton's chances of regular first-team football are likely to be limited. Chuck Lee Grant into the mix and Ole Gunnar Solskjaer is not short of options.

But the 35-year-old will provide a wealth of experience as back up, with him having played 377 senior games at various clubs, most notably Burnley.

Heaton's career has come full circle, with him having begun at Manchester United before leaving in 2010.

Read more here.

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"This is an important first signing for us," said Southampton boss Ralph Hasenhuttl, after the club signed Romain Perraud. "Left-back is an area in which we were looking to strengthen and we have tracked Romain for a long time."

They weren't alone if reports are to be believed with a number of Premier League clubs keen on a dynamic full-back who has played eight times for France U21.

Three goals and seven assists last season suggests he could provide a forward-looking replacement for Ryan Bertrand.

Read more here.

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Leicester got a big part of their business done early, following up the signing of Patson Daka with the capture of highly-rated midfielder Boubakary Soumare from French champions Lille.

The 22-year-old made 40 appearances in Ligue 1 last season and helped France reach the quarter-finals of the European Under-21 Championship in May.

Reportedly tracked by a number of Premier League clubs, he arrives to bolster the Foxes options in defensive midfield. The new N'Golo Kante? Brendan Rodgers will certainly hope so.

Read more here.

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Former England winger Theo Walcott found a new lease of life when he returned to first club Southampton on loan from Everton last season.

He scored three goals in 22 games last season and is clearly delighted to be back home permanently.

"I'm not sure I can properly express how happy I am about this," said Walcott, who has 47 England caps.

"Southampton is a club that means so much to me, and it has been incredibly special for me to have spent this season back at St Mary's. But to now have the opportunity to return for a further two years means such a great deal to me, both personally and professionally."

Read more here.