Heroic , valiant Sutton United are out .
Arsenal ( boo ! hiss ! ) are through to the FA Cup quarter finals thanks to a Lucas Perez cross-shot and Theo Walcott 's 100th Arsenal goal .
Heroic , valiant Sutton United are out and Arsenal ( boo ! hiss ! ) are through to the FA Cup quarter finals thanks to a Lucas Perez cross-shot and Theo Walcott 's 100th Arsenal goal .