Arsenal forward Danny Welbeck will be out until after next month's international break with a groin injury sustained against Chelsea on Sunday.
Welbeck will miss Wednesday's Carabao Cup clash with Doncaster, the Premier League games with West Brom and Brighton and the Europa League tie at Bate Borisov of Belarus.
Boss Arsene Wenger told arsenal.com: "Danny has a scan today. We don't know how bad his groin injury is but he will certainly be out until the international break."
Arsenal's first game after the internationals is against Watford on October 14.
Mesut Ozil, midfielder Francis Coquelin and full-back Mathieu Debuchy will also be absent on Wednesday - with Sky Bet making Doncaster 25/1 shots to upset the Gunners.
Midfielder Jack Wilshere played his first Gunners game in over a year in last week's Europa League win over Cologne.
Wenger said of Ozil: "Mesut is training again, but for (Wednesday), no (he will not feature). He has a little inflammation of his knee."
Defender Calum Chambers will be included against Doncaster either.
"It will be a similar team to the one that played against Cologne," Wenger added.
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