The winger, who celebrated his 18th birthday on Friday, will go in for surgery on a niggling shoulder injury next Tuesday. He is available for the trip to Everton on Sunday but Arsène Wenger will avoid using him if he can.
"Theo Walcott has his surgery on Tuesday," said the Arsenal manager. "I will consider him if I need him. But once you know he is having surgery it is obvious. We need to do it now because if we don't do it now then next season is under threat already."
Apart from that, the injury news is unchanged from that revealed by Arsenal.com on Thursday.
Emmanuel Eboue and Emmanuel Adebayor are still suspended. Gael Clichy is back from his ban but is struggling with a hamstring injury. Thierry Henry (groin and stomach) is out for the season and Robin van Persie (foot) is not expected back until the end of April.
Copyright 2015 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 16 Mar 2007