Arsenal defender Laurent Koscielny is out for the rest of the season and could miss this summer's World Cup after suffering a suspected ruptured Achilles.
The France centre-back suffered the injury during Thursday's Europa League semi-final defeat to Atletico Madrid, where he was carried off on a stretcher early on in the 1-0 defeat at the Wanda Metropolitano.
The 32-year-old lost his footing while moving towards Diego Costa off the ball, and was in obvious distress as he clutched his lower leg.
Gunners boss Arsene Wenger revealed after the game that he was fearing the worst for Koscielny with the World Cup on the horizon.