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Arsenal's win and Manchester United's draw moves Arsenal back into the top four.
Arsenal cruised to victory over a disjointed Southampton thanks to two first-half goals from Alexandre Lacazette and Henrikh Mkhitaryan at the Emirates, taking them back into the top four in the Premier League.
Arsenal took the lead in the sixth minute in bizarre circumstances, Lacazette neatly back-heeling in a pass from Mkhitaryan while the rest of the team were still appealing for a penalty after Lucas Torreira took a tumble in the box.
The home side doubled their advantage minutes later when…