Danny Welbeck scored a second-half winner to give Arsenal a 1-0 victory away to Sporting CP in the Europa League.
Both teams had maximum points on the board after two rounds and they looked set to play out a goalless draw in a mostly quiet affair in the Portuguese capital.
However, Welbeck came up with the decisive goal in the 77th minute, rifling a fine finish through the legs of goalkeeper Renan Ribeiro to give Arsenal an 11th straight win in all competitions.
Arsenal are now three points clear at the top of Group E, while Sporting still have a good chance to qualify for the knockout stages as they hold a three-point cushion in the second spot.
Bruno Fernandes fired an early chance over the crossbar for the hosts before Henrikh Mkhitaryan’s free-kick was beaten away by Ribeiro.
Nani lashed a drive over the angle before Sporting fans were angered when Sokratis Papastathopoulos appeared to drag Fredy Montero as he raced through on goal, with the referee waving the appeals away.
Ribeiro denied Aubameyang two chances of glory shortly after the start of the second half with Arsenal upping the tempo.
The referee cut short Welbeck’s celebrations when he blew for a push on Bruno Gaspar in the 67th minute after beating Ribeiro with a header.
Fortunately for Welbeck, Sebastian Coates’ error, gave the forward a chance to score his second goal in the competition this season, extending Arsenal’s winning streak under three-time Europa League winner Unai Emery.