Thompson left the field after just eight minutes in Kunming following a foul by Feng Xiaoting which left him with a medial collateral ligament injury.

He is expected to be sidelined for 3-4 weeks which would rule him out of Victory's home and away AFC Champions League 2008 matches against Japan's Gamba Osaka at Telstra Dome on April 9 and the rematch a fortnight later in Japan.

However, the club will await its own medical assessment after Thompson returns to Melbourne on Thursday.

It was a particularly disappointing early exit for Thompson who was given a rare chance up front for the Socceroos in the absence of Scott McDonald, John Aloisi and Josh Kennedy.