Paris Saint-Germain's Lucas Moura faces a race against time to be fit for the Champions League quarter-finals due to an ankle injury suffered against Nancy last weekend.
The Brazilian, 20, underwent tests in Paris on Tuesday which revealed no serious ligament damage to his left ankle, leaving the player himself to admit on Twitter that he was "relieved".
However, L'Equipe reported on Wednesday that he is still likely to be out for around three weeks with a sprain, with PSG hoping he will be fit for the Ligue 1 trip to Rennes on April 6.
If that is the case, the former Sao Paulo player will miss the first leg of the Champions League quarter-finals, set for April 2 or 3, while any setback would endanger his chances of featuring in the return a week later.
Lucas played in the 2-1 win against Nancy despite initially hurting the ankle against Valencia in the Champions League last 16, second leg.
His absence creates a problem for PSG coach Carlo Ancelotti, who must already do without Zlatan Ibrahimovic due to suspension for the first leg of the quarter-finals.
The Swede will complete a two-match ban handed down following his sending-off for a challenge on Andres Guardado towards the end of the first leg of the Valencia tie.
PSG have appealed the ban to UEFA, and will find out whether they have been successful or not before the end of this month.
The draw for the quarter-finals of the Champions League takes place on Friday.