Out-of-form Yuvraj Singh [ Images ] twisted his knee on Thursday during the warm-up session and is being examined.

Yuvraj hurt his knee in the morning practice session before the start of second day's play of the third Test against Australia [ Images ] and it is still not certain how serious is the injury, according to India's [ Images ] media manager M V Sridhar.

Yuvraj has had a nightmarish tour, failing in the first two Tests, as well as in the side game at Canberra, and was made to sit out in the ongoing Test.

There was a little concern on VVS Laxman's [ Images ] ankle but Sridhar allayed any fears.

Sourav Ganguly [ Images ] went for a check up from the ground in the morning but according to Sridhar the left-hander is fine and it was a routine check up. Apparently, the cough in his chest is still giving Ganguly a bit of trouble.