When Arsenal can qualify for Champions League knockout phase after Slavia Prague win

Arsenal took a giant step towards sealing qualification for the Champions League knockout phase with victory over Slavia Prague on Wednesday night. Noni Madueke and Viktor Gyokeres had the Gunners in cruise control at half time at the Fortuna Arena, the latter producing, arguably, his best all-round performance since arriving from Sporting last summer . Arsenal had chances to extend their lead through Eberechi Eze and Mikel Merino , but were almost punished for such profligacy.