Chelsea transfer news: £25m Bayern man update, Simeone on Costa, Messi

All the latest Chelsea transfer news including Atletico Madrid manager's Diego Costa revelation, Petr Cech on Lionel Messi and Mario Mandzukic update.

If Chelsea want to fortify their striking department even further, after already acquiring the services of erstwhile Atletico Madrid predator Diego Costa, then they may need to act quickly if former target Mario Mandzukic is still of interest.

The Bayern Munich forward, who has effectively been replaced at the Allianz Arena by Robert Lewandowski, is also wanted by Arsenal and Atletico - who now need a striker themselves having ratified Costa's sale. The Express claim that Atleti are in "pole position" as they can offer a guarantee of a first-team role.

Bayern, though, want to push through a transfer sooner, rather than later - preferably within the next fortnight, here's why.

Costa's departure from the Vicente Calderon side has been amicable, with manager Diego Simeone telling Chelsea supporters what to expect from their man, who was once described as an "animal" by Arsene Wenger.

"Diego Costa is where he wants to be and I am absolutely thrilled for him," said Simeone.

"I love Diego as a player - at Atletico Madrid he gave us so much and I will always be grateful to those players who have given me their all. Diego behaved in that way the whole time he was with us, so I wish him the very best at Chelsea, I hope he has a great season.

"He's at an age where he can continue to improve, so let's hope he can develop further. He'll have to adapt quickly to the system at Chelsea and to the coach, but let's hope the team can take full advantage of his characteristics. I see a player very much on the way up and I'm sure he'll be a success."

Emergent shot-stopper Thibaut Courtois, currently on international duty with Belgium in Brazil, believes his competitive familiarity with Lionel Messi will come in handy when his country collides with Argentina in the World Cup quarterfinal in Brasilia on Saturday.

Messi has scored four goals and one assist from four outings in the tournament and Courtois said: "I know him well from Atletico's games against Barcelona, so it'll be nice to play against him for our countries. Hopefully we can win, but we'll see. The good thing is that I don't have to watch videos of him because I know him so well. But even if you watch videos of him, he's so unpredictable that it's impossible to study him to know what he's going to do.

"As soon as he finds a way to shoot, he will shoot, so the only thing you can do as a goalkeeper is concentrate at all times."

Courtois will vie for the number one jersey in West London along with Petr Cech, who is wanted by Paris Saint-Germain and AS Monaco.

Cech's agent Viktor Kolar said: "Paris St Germain have shown interest and we have also communicated with Monaco. Nothing changes. He has two years left on his Chelsea contract and has an interest to continue there.

"We have not been given any signals that Petr will be made available and even if that was the case you have to realise that Petr is one of the world's top goalkeepers and has a certain salary. There are not many clubs who could afford to sign him - if he were to leave, we're only talking about two or three clubs in the world.

"The situation is always evolving, of course, but for now he is staying at Chelsea."

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