Manchester United's Cristiano Ronaldo has suffered no long-term damage to his thigh after a tackle by Porto's Nuno Valente during Tuesday's Champions League defeat.
The 19-year-old winger was taken off the field on a stretcher but a scan has revealed no break or tears.
But Ronaldo still remains a doubt for Sunday's game with Manchester City.
The news will boost United as Mikael Silvestre, Eric Djemba-Djemba and Quinton Fortune all remain sidelined.
Defender Silvestre hobbled off in training on Monday, while Djemba-Djemba was also hurt in Champions League action against Porto.
Silvestre faces several weeks out with a recurrence of his ankle injury, while midfielder Djemba-Djemba came off at half-time with a suspected broken rib.
"Mikael trained on Monday and in the last five minutes he stopped a shot and that was him out," United boss Sir Alex Ferguson said.
"It could maybe keep him out for two or three weeks now."
The champions are facing a critical spell of games following their European failure.
They need to win at the City of Manchester Stadium to keep their Premiership hopes alive.
Ferguson's men take on rivals Arsenal - who are nine points ahead of them in the league - in the FA Cup semi-final on 3 April.
Defeat in both these games would almost certainly leave the Red Devils without any major silverware this season.