Unai Emery has made four changes to the Arsenal starting XI which lost to Southampton in the Premier League on Sunday.

Petr Cech comes in for goalkeeper Bernd Leno, while defenders Laurent Koscielny, Hector Bellerin and Stephan Lichtsteiner drop out.

Ainsley Maitland-Niles, Sokratis and Aaron Ramsey come into the side.

Arsenal XI: Cech, Maitland-Niles, Sokratis, Xhaka, Monreal, Torreira, Guendouzi, Mkhitaryan, Ramsey, Iwobi, Aubameyang

There are also four changes to the Tottenham side which recorded a narrow 1-0 win over Burnley in their Premier League match on Saturday.

Harry Winks, Christian Eriksen, Paulo Gazzaniga and Son Heung-min come in for Harry Kane, Erik Lamela, Hugo Lloris and Oliver Skipp.

Tottenham XI: Gazzaniga, Trippier, Alderweireld, Davies, Rose, Winks, Sissoko, Eriksen, Alli, Lucas, Son

Chelsea

Image source, Reuters

Former Chelsea winger Pat Nevin has told fans engaging in "offensive singing and behaviour" to "stay away" from the Premier League club.

Chelsea and the Metropolitan Police are investigating claims Manchester City's Raheem Sterling was racially abused at Stamford Bridge earlier this month.

Anti-Semitic chants were then heard during the Stamford Bridge club's Europa League tie with MOL Vidi.

Nevin said he found it "anger-inducing and downright embarrassing".

Chelsea have suspended four fans while an investigation into the alleged racial abuse of Sterling takes place.

Nevin, a BBC football analyst, said recent wins over Brighton and Premier League rivals Manchester City meant "things should be hunky dory at the club" but they are "not by a long way".

Bournemouth

Image source, Reuters

Bournemouth are aiming to reach the last four of a major cup competition for the first time.

Chelsea beat the Cherries 2-1 at the same stage of this competition 12 months ago, but Bournemouth have lost six of their last seven league matches since their 2-1 fourth-round win over Norwich City.

However, boss Eddie Howe is hopeful of making some club history by beating a Blues side that are fourth in the Premier League.

He said: "It's well documented that we've never been in a major cup semi-final before, so what greater incentive can we have? We're very excited to try and make that happen.

"We have a massive hurdle to overcome, one I really want my players and staff to relish and try to rise to.

"It's a great game for us, we're very excited to be in the competition and trying to get to the semi-final."

Richard Browne: Pochettino isn’t going to United. He would have gone to Real in the summer had Zidane gone earlier, now he’ll wait another year to move to Spain

Image source, Getty Images

Chelsea assistant manager Gianfranco Zola says Bournemouth and England striker Callum Wilson is "of interest".

Wilson, 26, has been linked with a January move to Stamford Bridge after an impressive start to the season, and Zola feels he "has a lot of qualities".

"I'm sure there are a lot of players linked with us," said Zola.

"Callum is doing well and is of interest not only for us but for many."

Wilson has scored nine goals in 18 matches in all competitions for the Cherries this season and also netted on his England debut against the United States last month.

Tottenham Hotspur

Tottenham striker Harry Kane hasn’t played in a League Cup match since September 2015, when Spurs lost 1-2 at home to Arsenal thanks to a Mathieu Flamini brace.

Pete Cash: We need to buy two strong central defenders in the window or the Emery honeymoon could be over before valentines

Sulaimon Adelekan: Poch won't leave Spurs for Manchester United at the end of the season. He is an integral part of the ongoing success at the club. Unai Emery has done an incredible job at Arsenal, the belief and courage at the club is amazing at the moment

Chelsea make six changes but still name a very good side, while Bournemouth also make six - Callum Wilson is IN though.

Both sides go strong - as you'd expect.

Arsenal and Spurs both make four changes but it's still strong stuff out there.

Spurs fans, got something to say about the rumours surrounding your manager? Why would Mauricio Pochettino want to leave Tottenham for Manchester United?

Image source, Getty Images

Arsenal fans - are you so far pleasantly surprised at how the club has transitioned from the Wenger era, considering the fact that Manchester United have struggled to move on from the SAF years?

Who is favourite for the League Cup?

Bournemouth fans - must you keep Callum Wilson?

Sound off about these topics, or anything else, to us at #bbcfootball or on 81111 (UK Only, names on texts please).

Tottenham Hotspur

It would be nice to get a few minutes into a live page without mentioning the change of manager at Manchester United BUT with Spurs boss Mauricio Pochettino on the reported shortlist there is some relevance to tonight's action, I'm afraid.

Poch will no doubt face more questions between now and the end of the season. Will he stay at Spurs beyond this season?

Two cup quarter-finals tonight - Arsenal face Tottenham while Chelsea face Bournemouth.

No extra-time, no second legs, no replays. It's 90 minutes followed by pens if we need them. Lovely.

Tuesday night saw the first two League Cup quarter-finals play out, and it was holders Manchester City and Leage One side Burton Albion who fought their way through to the last four.

Read the match reports here, and here.

Let's tell Brenda that there's another north London derby tonight...

It's only 17 days since the sides met in the Premier League. And we're back again for some sweet Carabao Cup action.

Too much? That recent one was a classic though - more of the same tonight?