Chelsea rejected an astonishing £90m offer from Tianjin Quanjian in January for striker Diego Costa that would have seen the Spaniard become the second-most expensive player in football history, SFR Sport has revealed.

What's the word?

Chelsea ace Diego Costa was certainly embroiled in one of the saga's of the mid-season transfer window, with the Spaniard falling out with manager Antonio Conte amidst reported interest from the Chinese Super League- and the details of the offer from the Far East have been revealed.

The Blues turned down an audacious offer of £90m for the former Atletico Madrid forward, who would have become the second-most expensive footballer in history behind Manchester United's summer recruit Paul Pogba.

On top of that, Costa would have become the most expensive player to have been sold by English clubs, surpassing the fee Real Madrid paid Tottenham Hotspur for Gareth Bale and Manchester United for Cristiano Ronaldo.

Had Costa sealed a move to China, the striker would have earned a incredible £85m over three-years and he was extremely interested in a move. However, eventually, the striker remained at Stamford Bridge following a clash with club officials.

Will Costa stay?

Diego Costa is almost certain to see out the remainder of the season at Chelsea, although the Chinese Super League transfer window does not shut until Tuesday, but there is a huge possibility he will move on at the end of the season.

Antonio Conte came close to selling Costa in the summer, with Atletico Madrid keen to bring him back to the Vicente Calderon, and could of left in January. Because of that, many expect Chelsea will cash-in this summer and bring in a new striker.

With Diego Costa being 28, many will feel he's entered the prime years of his career but £90m for a striker of his age is a sensational amount and Chelsea would be daft not to consider a summer sale.