Stoke City's Jermaine Pennant holds his head after a missed opportunity during their English Premier League soccer match against Arsenal at the Emirates Stadium in London February 23, 2011 . REUTERS/Kieran Doherty (BRITAIN - Tags: SPORT SOCCER) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO USE WITH UNAUTHORIZED AUDIO, VIDEO, DATA, FIXTURE LISTS, CLUB/LEAGUE LOGOS OR "LIVE" SERVICES. ONLINE IN-MATCH USE LIMITED TO 45 IMAGES, NO VIDEO EMULATION. NO USE IN BETTING, GAMES OR SINGLE CLUB/LEAGUE/PLAYER PUBLICATIONS