Wenger calls for more Arsenal efficiency against Barca

Flummoxed by a rearguard action from Championship leaders Hull City in the FA Cup on Saturday, manager Arsene Wenger knows his Arsenal side must sharpen up for next week's Champions League last-16 clash with Barcelona. While the Frenchman made nine changes to the team that beat Premier League leaders Leicester City a week ago, they still unleashed the likes of Alexis Sanchez and Olivier Giroud off the bench but it was to no avail as the fifth-round tie ended 0-0. Holders Arsenal enjoyed plenty o