Aaron Ramsey scored in stoppage time to break the resolve of Crystal Palace and give title contenders Arsenal a winning start to their league campaign. Managerless Palace looked set for a point but had forward Jason Puncheon sent off for a second offence in the 89th minute before Ramsey pounced. The visitors took a shock first-half lead when Brede Hangeland headed in. The Gunners equalised just before the break when Laurent Koscielny nodded home from Alexis Sánchez's free-kick.