Emmanuel Adebayor grabbed the winner against Wigan as Arsenal earned the battling victory they wanted to prove they are Barclays Premier League title contenders.
Adebayor, making his second start after returning from an ankle injury, struck in the 16th minute at the Emirates Stadium and was denied further goals by Chris Kirkland and the woodwork.
Gunners boss Arsene Wenger saw Samir Nasri limp off after a robust challenge from Wilson Palacios but could reflect on three points to build on last Sunday's win over Chelsea.
How Arsenal would respond after defeating Luiz Felipe Scolari's men was seen as a true test of their title credentials, as they have recently struggled against so-called 'lesser' opposition.
It had undermined previous campaigns and this season the victory over Manchester United was followed up with defeats to Aston Villa and Manchester City.
Wigan were hardly in poor form either, after going unbeaten in their previous five league games. In fact, their only defeat in the last month was against Wenger's youngsters in the Carling Cup.
Gunners skipper Cesc Fabregas had suggested in his programme notes that teams travel to the Emirates Stadium just to defend, yet Steve Bruce fielded Emile Heskey and Henri Camara in attack, with Amr Zaki returning from a hamstring injury to take his place on the bench.
Determined to show enterprise, the visitors nearly took an early lead when Palacios' deflected shot almost wrongfooted Manuel Almunia, but the Arsenal goalkeeper recovered to gather.
Palacios, who was recommended to Bruce by Gunners boss Wenger at the start of last season, also drilled a dangerous ball across Almunia's goal, but it was the hosts who took the lead when Adebayor struck.
Fabregas had been hurt by a tackle by Titus Bramble but after discussing it with his bench, he stayed on the pitch and set up the opener.
After an Arsenal corner was partially cleared, Fabregas passed the ball back into the penalty area, helped by Alex Song holding off Bramble. It fell kindly for Adebayor, who tucked his finish under goalkeeper Kirkland for his first goal since his injury and his 10th of the campaign.
Robin van Persie was in the hunt for a second and could have earned a penalty when Maynor Figueroa clipped his heels as he raced onto an Adebayor header. The Dutchman stayed on his feet and Bramble got back to block when the shot came.
Palacios was popping up everywhere for Wigan but a tackle on Nasri from behind earnt him a yellow card.
There were worrying scenes for the Arsenal bench when Nasri stayed down and the France youngster eventually had to be replaced by Emmanuel Eboue in the 32nd minute.
Adebayor struck the post in first-half stoppage time, latching onto Van Persie's pull back and seeing Kirkland tip his fierce drive onto the woodwork.
The game opened up more at the start of the second half, with Ryan Taylor fizzing over a dangerous cross that required clearing.
Heskey was also given a free header from Figueroa's cross but his effort was straight at Almunia.
Arsenal were refusing to sit on their lead and Van Persie raced through twice, only to shoot wide each time, and Bacary Sagna had a near-post header saved by Kirkland.
Wigan pleaded with Steve Bennett for a penalty when Kolo Toure tangled with Camara but the referee waved play on.
Denilson then crashed a drive against Kirkland's upright with a shot from 25 yards.
Almunia pulled off a stunning save to stop Mario Melchiot scoring from point-blank range, and Wigan again appealed for a penalty when Song and Figueroa tussled for the rebound.
Adebayor should have added to his tally but headed wide from a corner and had a one-on-one effort saved by Kirkland.
Heskey almost earned a point but headed just over the bar with a minute remaining.
