​Chelsea are running out of patience with Diego Costa and are willing to sell the striker in the summer, according to the ​London Evening Standard.

The Spain international had a great first half of the season but his form has wained ever since he was targeted by Chinese Super League side Tianjin Quanjian, who offered Chelsea £80m and the 28-year-old a contract worth around £570,000-a-week in January.

Manchester United v Chelsea - Premier League

Costa has managed only three Premier League goals since the transfer saga, which kept him out of a 3-0 win at Leicester during January, and Chelsea are now fed up with the former Atletico Madrid man and willing to listen to offers.

Talks regarding a new contract for Costa were held in February but the Stamford Bridge club are now having second thoughts regarding the extension, especially as the striker is eager for significant increase on his current £150,000-a-week wages.

Costa remains a key part of Chelsea's side who are hoping to complete a domestic double of the FA Cup and Premier League this season, with the Blues taking on Spurs on Saturday in the knockout competition, but he could leave once the campaign ends with Tianjin and former club Atletico Madrid said to be interested.

Costa still has two-and-a-half seasons remaining on the contract he signed when joining Chelsea back in 2014, but his potential departure could pave the way for Chelsea to resign former striker Romelu Lukaku.

The Belgium international recently rejected a new deal with the Toffees, meaning he could be looking for an exit from Goodison Park in the near future.