Tottenham coach Mauricio Pochettino fears talisman Harry Kane could miss the remainder of the season, after suffering another ankle injury in Spurs' Champions League defeat of Manchester City.
The England captain, who was out for a more than a month, after sustaining ligament damage in January, rolled his ankle and was then caught on it by Fabian Delph in the quarter-final first leg.
Spurs went on to win the game 1-0, via a second-half Son Heung-min goal.
"If you see the action, it is an action that can damage the ligament again," Pochettino said post-match. "We need to check in the next few days.
"It is so painful. We hope it is not a big issue and [he'll] try to recover as soon as possible, but it doesn't look good."
Asked if he was worried Kane's season could be over, Pochettino said: "Yes."