English Premier League club Chelsea FC is planning to sell Diego Costa to Chinese Super League team Tianjin Quanjian this summer for a transfer fee of $158 million.

Costa, 28, has been linked to the newly-promoted CSL side since last month following reports went out that he had a row with one of Chelsea's fitness coaches during practice. It resulted in him sitting out a weekend game versus Leicester City, but everything is said to have been patched up at the moment.

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There were also rumors that he is having a falling out with manager Antonio Conte and could be headed to the Far East as early as this winter's Chinese transfer window. However, with only a day left before the close of the said window, it seems like the Spain international is staying at the Stamford Bridge for now.

Rumors have emerged that the Blues have turned down a $112 million offer from Tianjin Quanjian for Costa and will only sell him for $158 million at the end of the season, according to Caught Offside. Quanjian is reportedly ready to pay Costa $106 million in wages for a three-year span, which would make the Spanish striker one of the highest-paid footballers in the world.

Chelsea is said to be keen on keeping Costa for the foreseeable future but could also "part ways if the price is right."

The $158 million transfer fee would shatter the current world transfer record spent by Manchester United to acquire Paul Pogba from Juventus, which was around $110 million, according to The Sun.

Costa has been with Chelsea for the last two-and-a-half seasons. He has appeared in a total of 106 games for the London outfit and scored 54 goals in all competitions. He led the Blues to a Premier League title during his first season at Stamford Bridge in 2014-2015, scoring 20 goals in 26 English top-flight matches.

Chelsea is potentially headed to a second Premier League win in three seasons, leading the league with 63 points at the moment. Their closest pursuer, Tottenham Hotspur, is 10 points below in the standings.

Tags Football Transfer Rumors, Football Transfer Rumors 2017, Diego Costa, Chelsea FC, Tianjin Quanjian FC