Arsenal manager Unai Emery says he is not sure if his star midfielder Aaron Ramsey will feature in their remaining games this season.
The Wales interntaional picked up an injury duiring the English giants' 1-0 win over Italian side Napoli on Thursday night.
The victory saw the Gunners advance to the semi-finals of the UEFA Europa League after winning the quarter-final tie 3-0 on aggregate.
The creative midfielder, who is set to leave Arsenal for Italian champions Juventus in July 2019, was forced off during the first-half after a strong start to the match.
Spanish tactician Emery was full of sympathy for Ramsey when he was asked about the injury after the game.
“He was in a very good moment, he was playing with a big behaviour and commitment to do something important for us," Emery said.
“His injury today can give us some matches without him. I don’t know if we’ll see him again before the end of the season.”