The ex-Gunners defender knows his former side face a tough task against a Hammers side with "plenty to play for".
Southampton and Newcastle United will face each other in the Premier League on Saturday.
Brighton & Hove Albion boss Chris Hughton has been linked with the Aston Villa managerial job.
West Ham United and Arsenal will face each other in the Premier League on Saturday.
A look at how Morgan Schneiderlin and Eric Dier compare ahead of Manchester United's visit to Tottenham.
The Danish international has not featured for Leeds in 14 months.
The Gers skipper has hailed the quality and attitude of Southampton midfielder Steven Davis, whom he played alongside for a season.
West Ham have joined the race for Leeds goalkeeper Bailey Peacock-Farrell.
If Everton fire Roberto Martinez, should Aston Villa make a move?
The West Ham goalkeeper is delighted with the bond he has developed at Upton Park.
The Daily Mail claimed that the White Hart Lane side had a £15 million bid rejected by their London rivals yesterday.
Welcome to this morning's transfer round-up. This edition features 'Manchester United complete deal for Anthony Martial' and 'Nedum Onuoha pens new Queens Park Rangers deal' plus more, so delve in below.
Aston Villa have signed Liverpool defender Tiago Ilori.