Arsenal assistant coach Steve Bould was impressed with the way his side battled back from a nervy first half display to emerge as clear 3-1 winners over Olympiakos in their Champions League clash.
Arsenal were sloppy in the opening half and lucky not to be behind by the time Gervinho swept in a shot from outside the box to give them the lead three minutes before half time.
But they couldn't hold out until the interval as Kostas Mitroglou's glancing header brought the Greek visitors level.
The Gunners were far better after the break, and retook the lead when Lukas Podolski pounced on a deflected Gervinho cross to fire into the net. Aaron Ramsey added late gloss with a neat finish after substitute Olivier Giroud's flick on.
Bould, who again sat on the bench in place of Arsene Wenger as the Frenchman continued to serve a European ban, said of the victory: "It was tough, they made it tough for us. We started well enough but then looked a little bit nervous. Overall it was fantastic result.''
With Schalke being held by Montpellier at home Arsenal are now two points clear at the top of the group, although Bould is not getting carried away. He told Sky Sports: "It's early days, there's an awful lot of work still to do.''
Captain Thomas Vermaelen echoed those thoughts, admitting his side were not up to speed on occasion in the first half before improving after the break. The centre-back said "The second half was better, in the first half we were sloppy sometimes with the passing, we lost a lot of balls. We stared well but the first half was not great.''
Vermaelen did not think Arsenal's 2-1 home defeat to Chelsea at the weekend had any influence on their sluggish first-half showing.
He said: "We started well, with a high tempo and that was great but then we dropped a little. I don't think it was because of the weekend, sometimes these things can happen. We did much better in the second half.''
He added of the win: "It gives us more confidence to have two wins from two. The most important thing is to win your home games. We want to keep it going.''