Barcelona defender Oleguer will miss the return leg of the Champions League semi-final against AC Milan next week after injuring a thigh muscle, the Primera Liga club has confirmed.
He was substituted near the end of Barca's 1-0 first leg win at the San Siro last night.
Club doctors said Oleguer would be out of action for about 10 days, which means that as well as missing Sunday's league match at Sevilla and Wednesday's Champions League clash he may also be unavailable for the following weekend against Cadiz.
Barcelona are 11 points clear at the top of the Primera Liga with five games to play.