Diego Costa is a doubt for the FA Cup quarter-final trip to Everton on Saturday after limping off in the second-half as PSG beat Chelsea 2-1 (4-2 on aggregate) in the Champions League.

Having tormented the visitors defence in the opening 45 minutes, the striker saw his endeavor pay off as he was duly rewarded with the goal he deserved, to bring Chelsea level on the night and shove the 'spot the fraud' taunts down PSG throats, as they looked to up the ante on social media prior to kick-off.

Already nursing one injury heading into the game, Costa decided that the protective face mask he was sporting to shield a broken nose, had become too much of a hindrance and was unceremoniously removed, before being flung to the side.

Diego Costa who had scored for Chelsea in the first-half goes down in pain as he holds on to his right leg

Costa leaves the field as he is consoled by former defender David Luiz (right) on Wednesday

Guus Hiddink (left) and PSG boss Laurent Blanc console the injured striker heads for the tunnel

With the match finely poised, the pendulum would swing drastically in favour of the French champions during several second-half moments.

Costa went to ground with half an hour left, the Spaniard clutching his thigh to indicate it was time-up and after being helped to his feet, he was consoled by former Chelsea defender David Luiz, as he was given a rousing ovation by the home supporters and replaced by the in-form Bertrand Traore.

Costa applauds the Chelsea fans as he departs the action after succumbing to a thigh problem

The Spain forward started the match wearing his protective mask but he removed it after 10 minutes

Seven minutes after the former Atletico Madrid man departed, it was another front-man who would make his mark, as man-of-the-match Zlatan Ibrahimovic - already creator for the opening goal, when his brilliant, low cross was finished off by Adrien Rabiot, tapped in following an assist from former Manchester United winger Angel Di Maria.

Chelsea manager Guus Hiddink, who threw caution to the wind as the Blues piled on the pressure in search of a response, admitted he knew Costa was not 100% fit, but gambled with his star forward.

'We knew Costa wasn't totally fit, but he wanted to play.

'Diego was desperate to play today, although not 100 per cent fit. I don't know if that became worse. I don't know if it's worse than before the Stoke game (which Costa missed as a precaution).

'We'll see if there's big damage tomorrow,' said Hiddink, talking about both Costa and Hazard - the latter also limped off after picking up a knock he tried to run off, before making way for Oscar.'