Big Sam Allardyce - as I believe he's officially called - is in place at Upton Park and ready to answer questions from the media...

Image source, The Mirror

The Mirror reports on a treble blow for Chelsea, Costa's possible ban, a £25,000 fine for Mourinho, and an injury to midfielder Cesc Fabregas.

Andrew Benson
BBC Sport chief F1 writer

"The first launch of a 2015 car is due later on and it's a biggie - the wraps come off the McLaren-Honda the all-star line-up of Fernando Alonso and Jenson Button will drive.

"To whet people's appetites, McLaren have produced a little taster video starring their two drivers and based on the Back To The Future movies.

"It's a little nod to the first - and hugely successful - partnership between McLaren and Honda, back in the, yes, '80s.

"Alonso seems to be channelling a bit of The Princess Bride's Inigo Montoya in it, and there's a nice Lewis Hamilton joke by Button. Well worth two minutes of your time."

You can watch it here, external.

Image source, Getty Images

A big blow in Australia - assuming you're an Andy Murray fan - because the Scot has just lost the opening set against Tomas Berdych 7-6 on a tie-break.

It was a strange set, Murray appearing to limp and move a little awkwardly from an early stage.

There has been no trainer on court as yet though.

A big challenge now for Murray to come back and win. The prize, remember, is huge - a place in the Australian Open final.

There is live coverage on BBC Two from 08:30 GMT, as well as commentary on Radio 5live Sports Extra, and live text commentary by BBC Sport's Aimee Lewis here.

A final word from Roberto Martinez. Asked about whether he would bring anyone in before the end of deadline day, the Spaniard replied: "It is hard to tell. We are not looking at this window to try and find solutions. We did that work in the summer.

"I feel the work is to try and get the players back in a confident mood and to remind them, we haven't lost any of the talent we had last season. We have a strong squad.

"But as a football club we will always try to use the windows in our favour."

So that leaves us absolutely none-the-wiser then. And with that, he's off.

Asked if there is any truth in rumours that Everton have been offered Dimitar Berbatov, now at Monaco, Martinez put his best poker face on.

Image source, Getty Images

"I know you love to throw names out but I'll never comment on other players. He is registered with another club so I won't comment," said the boss.

The interviewer didn't give up, adding 'does the same go for Cardiff goalkeeper David Marshall (another rumoured target)?"

Martinez replied: "Is he registered to another club? Then yes, no comment."

Back to Everton, where Roberto Martinez has been asked if he intends to replace samuel Eto'o after the striker's departure to Sampdoria.

"Arouna Koné is fully fit and he is ready to give a lot to the team so I feel we don't need anyone to replace Samuel in that position," said the Toffees boss.

"Ross Barkley and Steven Naismith have been playing in that number 10 roles and I think we are strong in that area."

Image source, Getty Images

From non-league Ilkeston to scoring twice in the League Cup semi-final… It's been quite a ride for Che Adams since he signed for Sheffield United in November.

But who are the best players to have come from obscurity to make a name for themselves?

Have your say on Twitter using #NonLeagueGems or have your say on the BBC Sport Facebook page, external.

Here's a few to get you started from Facebook.

Mike Baker: Charlie Austin. Bricklayer to Premier League player via my beloved #STFC. Most natural goalscorer I've ever seen

Alex Southern: Dwight Gayle, within 2 seasons he went from non-league to premier league

Ellis Hewins: Jamie Vardy, £1 million non-league player ripped Man Utd to pieces

Roberto Martinez: "The break really helped Kevin Mirallas and James McCarthy - both have a chance of being involved on Saturday."

Asked if he was surprised at the impact Alan Pardew has had, Martinez replied: "I'm not surprised. It happens when you go back to a club that you know inside out.

Image source, Getty Images

"It makes it a lot easier. His players want to show what they can do. You get a couple of results and suddenly the team oozes confidence.

"The experience of Alan will be a real strength to that side."

Everton travel to a Crystal Palace side rejuvenated under Alan Pardew on Saturday, which is what Roberto Martinez is asked about first.

"They have scored six goals away from home in their last two games and they are in a very good moment of their season, if not the best," said the Toffees boss.

"For us they have been a bit of a bogey side. The last three games at Goodison have always had a lot of goals.

"They bring a lot of threat and pace and are well organised defensively. With a new manager they will be full of confidence and they are a very dangerous team to face."

Image source, Everton FC

The Everton manager Roberto Martinez has arrived to do his media duties, the first of eight Premier League bosses holding news conferences today. We'll bring you the best of what the Spaniard has to say.

Our first transfer of the day comes from League Two promotion hopefuls Burton Albion, who have signed Dutch forward Abdenasser El Khayati on a contract until the end of the season.

The 25-year-old started his career at PSV Eindhoven and moves to Staffordshire from Kozakken Boys, where he had scored 10 goals in 10 games so far this season.

Image source, Daily Mail

More about Diego Costa and his possible ban in the Daily Mail - as well as news that rugby union's Steffon Armitage has been questioned at a police station in Toulon over an alleged assault.

Richard Conway
BBC Radio 5 live sports news correspondent

"Sepp Blatter has formally submitted his own candidacy for the Fifa presidential election ahead of tonight's deadline for nominations."

Ospreys have signed scrum-half Brendon Leonard from Italian side Zebre on a three-year deal from 2015-16.

The 29-year-old, who played 13 Tests for New Zealand, will provide experienced rivalry and cover for Rhys Webb while the latter is on Wales duty.

Image source, Manchester City Twitter

"The scene this morning as East Manchester is hit by Snowmageddon!" tweet Manchester City, external.

The snow is also hurtling down in Salford at BBC Sport's hq ... could be tricky driving home from work this evening.

Image source, The Guardian

And so to a round-up of the morning papers, starting with The Guardian. Diego Costa is their main story, and the news that the Chelsea man - who, as if you needed telling, has been charged for violent conduct after an alleged stamp - could miss the Blues crucial Premier League clash with Manchester City.

The tennis has begun Down Under.

Andy Murray is taking on Tomas Berdych in beautiful conditions in Melbourne, the prize for the winner a place in the Australian Open final.

It's going with serve in the early stages, Berdych 2-1 ahead.

A reminder there is live coverage on BBC Two from 08:30 GMT, as well as commentary on Radio 5live Sports Extra, and live text commentary by BBC Sport's Aimee Lewis here.

Image source, Getty Images

Daily Telegraph, external: Paris St-Germain have held talks with Tottenham to sign striker Emmanuel Adebayor, 30, on loan for the rest of the season.