Image source, @arsenal

Laurent Koscielny is available for Arsenal's game against Crystal Palace but the Gunners boss adds: "The Germans are not ready yet". He adds: "It will be a similar squad that faced Manchester City in the Community Shield."

On Arsenal's title chances: "I believe we have a chance because we were top for a long time but we have to take more points from the top teams. "The favourites for the title are Chelsea, Liverpool, Man United, Man City and us."

Arsenal manager Arsene Wenger says Tony Pulis's exit as Crystal Palace manager was 'a complete surprise'.

The Gunners launch their 2014-15 campaign at home to Palace on Saturday, and Wenger adds: "The only thing you can say is he's done a remarkable job there."

Image source, @Arsenal

Arsenal:, external The boss is here.

Crystal Palace are eyeing up former Tottenham manager Tim Sherwood as a replacement for Tony Pulis, according to the Sun. , external

A reminder that Arsene Wenger's news conference is coming up ahead of Arsenal's opening Premier League game at home to Crystal Palace. Hull boss Steve Bruce is also set to face the media at the same time ahead of his side's trip to QPR. We'll have the best lines from both.

BBC Wales Sport journalist Dafydd Pritchard:, external Reading defender Sean Morrison has undergone a medical with Cardiff City. Just a few personal terms to finalise now.

More reaction on the exit of Tony Pulis at Crystal Palace. Crystal Palace Supporters Trust spokesman Chris Waters tells BBC Radio 5 live that the timing of the manager's exit is "spectacularly terrible".

He adds: "I suspect that Tony's wanted to buy experienced Premier League players, who are very expensive and and on very high wages. I don't think that Steve Parish agrees that we should be buying all these players - we should be buying younger ones who are cheaper, with something to prove to sell on at a bigger resale value later."

BBC Radio 5 live

Tony Livesey is hosting a special Premier League 'Your Call' from 09:00 BST on BBC Radio 5 live. What are your hopes for the new season? Call 0500 909 693 [free from some landlines; other networks will vary]. Text 85058 [standard rate]. Email breakfast@bbc.co.uk.

Defender Alan Hutton is set to complete a remarkable turnaround by making his first Aston Villa appearance in over two years on Saturday against Stoke, according to the Daily Telegraph., external

The report adds: "Villa manager Paul Lambert admitted last season the 29-year-old had been frozen out due to his hefty £40,000 a week wages, but chairman Randy Lerner wants all big earners available for selection as he bids to sell the club."

Image source, FC Barcelona on Twitter

Barcelona have tweeted this photo, external of Luis Suarez "ready for his first Barça training session" a day after the Court of Arbitration for Sport upheld his four-month ban for biting, but allowed him to train with his club.

BBC Radio 5 live

BBC Radio 5 live football correspondent John Murray talking about Tony Pulis: "I was with Tony at the Community Shield - there was no particular indication then or through the summer that he would not be manager at the start of the season.

"I know he felt this was just the start for Crystal Palace, they needed to retain their status in the Premier League for at least three years in order to realise the club's full potential.

"He felt the club needed a complete upgrade off the pitch. It's no secret that there was this creative tension between him and Steve Parish."

So what's on Friday's menu?

We have Arsene Wenger's news conference coming up at 09:00 BST before Manuel Pellegrini will be talking up Manchester City's chances of defending their Premier League title at 12:00 BST.

Fancy a bit of Mourinho? No problem. Jose is coming up at 12:30 BST followed by Liverpool boss Brendan Rodgers at 14:00 BST. Louis van Gaal will also be conducting his news conference ahead of his first Premier League match in charge of Manchester United at 14:30 BST.

Image source, @suttonnick

Understandably, the back pages of England's national newspapers on Friday are full of the goings on at Crystal Palace. The Daily Express headline (above) is 'Pulis In Palace Revolt'. The Daily Mirror, external adds: "There were rumours Steve Parish (co-chairman) had promised him £30m but with 48 hours of the new season to go the Eagles had forked out just £2.5m for four new players.

They also missed out on Gylfi Sigurdsson, Steven Caulker and others which clearly was the straw that broke the camel's back."

Former England striker Michael Owen:, external Tony Pulis leaves Palace. The madness has started and a ball hasn't been kicked yet!

Crystal Palace youth team player Ryan King-Elliott:, external To think I trained with Tony Pulis on Thursday and now he's gone, shows anything can happen these days.

Sportingintelligence:, external Louis Van Gaal started work at Manchester United on 14 July and is already longer-serving than managers at Huddersfield & Palace (situations vacant).

So you spend your summer strengthening and preparing your side for another long slog in the Premier League. You even take them away to the United States on pre-season tour. You buy a defender from Liverpool in the morning, external and up sticks and leave in the evening.

What on earth is going on at Crystal Palace? Why has Tony Pulis left by mutual consent on the eve of the new campaign? Palace have yet to officially comment, but there's a media scrum forming outside the club's training ground on Friday morning.

Image source, PA

It's the eve of a new Premier League season. A time of unbelievable excitement for fans. A time when multi-million pound signings are poised to kick a ball in anger for their new clubs for the first time. A time when weeks of military planning is ready to be executed on the pitch. The calm before a nine month storm.

That is unless you're Crystal Palace, where the chaos has started before the season has even got going. After ending last season on a high, the Eagles find themselves without a manager after the shock departure of Tony Pulis late on Thursday.

We'll have reaction to Pulis's exit throughout the day and we'll be hearing from the likes of Arsene Wenger, Jose Mourinho, Louis van Gaal, Manuel Pellegrini and Brendan Rodgers. Welcome to Friday's Sportsday Live.