The Czech Republic international has been first choice at Chelsea for ten years.Reuters

Chelsea manager Jose Mourinho has hinted that Petr Cech could be sold before the start of the new season after revealing that Mark Schwarzer will be the club's No.2 goalkeeper next season.

After 10 years unmoved as first choice at Stamford Bridge, the return of Thibaut Courtois from a three-year loan spell at Atletico Madrid is set to see him replaced in the Blues goal..

And Mourinho says that while he relishes choosing between both Cech and Courtois, he suggests the former could leave Chelsea after indentifying Schwarzer as the reserve goalkeeper this term.

"Petr is ready to fight for his position but Thibaut is the best young goalkeeper in the world, no doubts about that," Mournho told the Evening Standard.

"They will fight and for me it's a good problem to have to make a decision."

"We are a club that wants to be strong and wants to have a real possibility of competing for trophies and we want competition for places.

"But I know that Mark Schwarzer is a very good keeper, very stable and a good man, completely ready to be our second goalkeeper like he was last season and to give positive performances if we need him to play."

Cech has already stated his intention to remain at Chelsea this season however his role in west London is like to be limited this term.

After a successful spell with Atletico, Courtois returns to Chelsea ready to make a genuine impact this season with the club who are the early bookmakers' favourites to win the Premier League title.

"I signed three years ago so now I am happy to actually be here, to be a part of this club," said Courtois

"My new team-mates have been really great; they've welcomed me and you really feel that you are a part of this team. Obviously it helped me that I knew some of the players before I arrived.

"When I signed here I had played for just one year in the Belgian league. I wasn't anybody. In the last three years, I have been able to improve myself a lot and make my name in the football world.

"Now it is up to me to keep working hard here at Chelsea, keep improving myself and helping the team to achieve the things we all want."