Liverpool have been handed an injury headache after Fernando Torres lasted less than 16 minutes of Wednesday's World Cup qualifier against Belgium.

Spanish media are reporting it was precautionary as the Liverpool striker had felt a tweak in the muscle in the back of his left leg.

Liverpool will be hoping it is not serious problem as they face Wigan and Chelsea in the Barclays Premier League next week, as well as a Champions League trip to Torres' former club Atletico Madrid.

Spain team doctor Oscar Celada said on Spanish television: "He has intense pain in the back part of the thigh. It is difficult to diagnose now exactly the extent, if it is a question of a strain or a small tear.

"If it is a strain then he could be out for about a week."