LONDON -- Diego Costa has been sent to hospital for a scan on the shin injury that forced him off during Chelsea's 3-3 draw with Everton at Stamford Bridge, according to interim manager Guus Hiddink.
Costa limped from the field to be replaced by Loic Remy in the 80th minute after inspiring Chelsea back into the match from 2-0 down, rounding Tim Howard to tap into an empty net on 64 minutes before back-heeling into the path of Cesc Fabregas to set up a deflected equaliser two minutes later.
In Costa's absence, Everton regained the lead when Ramiro Funes Mori converted a Gerard Deulofeu cross at the start of injury time, only for John Terry to atone for an earlier own goal by back-heeling beyond Howard from an offside position in the 98th minute to earn Chelsea a point.
After the match Hiddink confirmed that Costa was in serious pain, but remained hopeful that the injury will not prove as bad as first feared.
"He is in the hospital and they will check him with a scan," Hiddink said. "We don't know the result yet but I hope it's not bad. [It was] on his shin. He was in a lot of pain."
Costa has enjoyed a revival under Hiddink, scoring five goals in his last five matches in all competitions, and any significant injury to the Spain international would be a huge setback for Chelsea, who face Arsenal at the Emirates Stadium next weekend.
Loic Remy is working his way back to full fitness following a calf problem and Radamel Falcao remains a long-term absentee with a "very serious" thigh injury.
Asked if Costa's latest injury scare could tempt Chelsea into the January transfer market, Hiddink replied: "At the moment we are doing nothing. Diego is coming out of the hospital and we go on as we are now. I always have my attitude that when something has to be done we don't go public.
"It's not wise to talk. We're not in negotiations with whoever at this moment."