Clarke makes four changes to his starting XISTEVE Clarke makes four changes to the team that lost 1-0 against Stoke last Saturday.
Claudio Yacob misses out altogether due to a minor hamstring problem, while Goran Popov, Markus Rosenberg and Graham Dorrans are dropped to the bench.
Liam Ridgewell, James Morrison, Peter Odemwingie and Chris Brunt are restored to the Baggies’ starting XI.
Arsene Wenger makes three changes to the side that lost 2-0 against Swansea in their last Barclays Premier League outing a week ago.
Theo Walcott misses out altogether due to injury, with Carl Jenkinson and Lukas Podolski are relegated to the dugout.
Bacary Sagna, Olivier Giroud and Alex Oxlade-Chamberlain come in.
ARSENAL (4-2-3-1): Szczesny; Sagna, Mertesacker, Vermaelen (c), Gibbs; Arteta, Wilshere; Oxlade-Chamberlain; Cazorla, Gervinho; Giroud. Subs: Martinez (gk), Rosicky, Podolski, Ramsey, Squillaci, Coquelin, Jenkinson.
ALBION (4-2-3-1): Myhill; Reid, McAuley, Olsson, Ridgewell; Morrison, Mulumbu; Odemwingie, Gera, Brunt (c); Long. Subs: L Daniels (gk), Popov, Dorrans, Fortune, Rosenberg, Tamas, Lukaku.
REFEREE: M Jones (Chester).