Arsenal need to be ruthless to secure a win against Sporting and snap their negative run of form away from home in the Champions League, manager Mikel Arteta said ahead of Tuesday’s clash.
Winless in their last four European outings, Arsenal arrive in Portugal following a 1-0 defeat against Inter Milan at San Siro earlier this month.
Arteta’s side currently sit 12th in the new Champions League 36-team format, where