Unai Emery has claimed the injury sustained by Arsenal’s Hector Bellerin is “not positive on first impression” after the right-back was carried off during the 2-0 victory over Chelsea.
Bellerin, 23, was take off on a stretcher on 72 minutes after suffering the knee injury at the Emirates Stadium on Saturday.
The Spaniard was making his return to the Gunner’s starting XI after picking up a calf injury against Southampton in December.
But the outlook looks bleak for Bellerin, with Emery saying: “The prediction is it could be an important injury.
“We have to wait until tomorrow, but first impressions are not positive.”
It was a sour end to what was a fantastic win over their rivals for fourth spot in the Premier League as Arsenal reduced the gap on Chelsea to three points.
First-half goals from Alexandre Lacazette and Laurent Koscielny was enough to give Arsenal the three points.
Chelsea boss Maurizio Sarri launched an almighty attack on his player’s mentality after the game but Emery was full of praise for his players, adding: “Today, every circumstance came with us. The mentality was good.
“And we want to have the same mentality today at home and away – which we haven’t yet.”