That means Welbeck will miss tomorrow night's third round League Cup clash at home against Doncaster, Premier League fixtures at the Emirates against West Bromwich Albion (Monday night) and Brighton & Hove Albion (Oct 1), and their UEFA Europa League group stage away tie at BATE Borisov.
"We don't know how bad his groin injury is but he will certainly be out until the global break".More news: Google Is Buying Part of HTC's Mobile Business For $1.1 Billion
England worldwide Wilshere has not started a game for Arsenal in 16 months, due to injuries as well as spending last season on loan at Bournemouth. "We don't know how bad his groin injury is but he will certainly be out until the worldwide break". Little-used right-back Mathieu Debuchy is said to be "coming back slowly", although will play no part against Doncaster.
The injury will hasten Wenger's will to re-integrate Alexis Sanchez into his side as a regular starter, following his benching against Chelsea, and will hope that the Chilean can overcome his disappointment after missing out on a move to Manchester City. "He has a little inflammation of his knee".
The Englishman has played all five of the Gunners' league matches so far this year, scoring three goals and adding an assist.
Doncaster are one of just three English teams that Arsene Wenger has faced as Arsenal manager but failed to beat (Port Vale and Rotherham), though the Gunners did progress on penalties in their League Cup tie in December 2005.