Thomas Vermaelen insists Arsenal's Champions League hopes remains alive.

The Gunners must overcome a first-leg 2-1 deficit against Porto at the Emirates.

Arsenal have rebounded from recent setbacks that included comprehensive losses to Manchester ­United and Chelsea as well as ­disappointments earlier in the campaign.

"We need that spirit again in the home match," said Vermaelen, the £10million signing from Ajax who has proved an instant hit with the Arsenal fans and who has been a significant ­impact in English football.

"We have proved it before and now we have to do it again. We have to win the home game and I am ­confident we will go through.

"I think that we have the ­quality to do that."

Vermaelen was grateful for the away goal, which could prove vital.

"That could be important and the tie is not over yet. Not at all."