LONDON (AFP) - Chelsea striker Diego Costa was taken to hospital after injuring his shin in his side's eventful 3-3 draw with Everton on Saturday, interim manager Guus Hiddink revealed.
"He's in the hospital and they will have a scan," Hiddink told reporters at Stamford Bridge.
"We don't know the result yet and I hope it's not bad. It's on his shin. He was in a lot of pain, that's true."
Costa, 27, was replaced by Loic Remy in the 80th minute after hurting himself in a challenge on Leighton Baines.
He had earlier scored in the 64th minute to spark a comeback that saw Chelsea come from 2-0 down to level.
Ramiro Funes Mori restored Everton's lead in the first minute of stoppage time, only for Chelsea captain John Terry to atone for an earlier own goal with a 98th-minute equaliser.
Costa was Chelsea's top scorer last season with 20 goals as the west London club completed a Premier League and League Cup double.
The combative Brazil-born Spain international has not been as effective this season, but he has scored five goals in his last five appearances to take his tally for the campaign to nine goals in all competitions.