Mathieu Flamini has been ruled out of Arsenal's key clash with Manchester United on Sunday so Gilberto is set for a rare start at Old Trafford.Flamini has been ruled out for three weeks with an ankle problem and will almost certainly be replaced in the starting line-up by Gilberto.

Defender Bacary Sagna remains on the sidelines with his ankle problem but striker Robin van Persie could start after coming on as a substitute against Liverpool.

Kick-off on Sunday is at 4pm.

Gunners (from): Almunia, Toure, Gallas, Senderos, Clichy, Eboue, Fabregas, Hleb, Van Persie, Adebayor, Lehmann, Song, Gilberto, Hoyte, Bendtner, Walcott, Diaby.

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