By Chris Harris

Arsène Wenger faces an anxious wait before discovering the true extent of Cesc Fabregas' knee injury.

Arsenal's captain was hurt in a challenge with Liverpool midfielder Xabi Alonso right at the end of the first half on Sunday and did not reappear for the second half of the 1-1 draw at Emirates Stadium.

Immediately after the game Wenger told Arsenal TV Online that Fabregas could be sidelined for "two or three weeks". However in his post-match press conference the Frenchman admitted that he could not be sure until the Spaniard was properly assessed.

"It is a medial knee ligament problem," explained Wenger.

"I don’t know [how long he will be out], it is difficult to assess. Of course it is a blow, you don’t want to lose a player like that but we have to cope with it."

Arsenal.com will have further news of Fabregas' injury on Tuesday afternoon.

Copyright 2014 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 22 Dec 2008