Wenger: No qualms over Kieran
The French left-back is expected to be out for several weeks with a suspected stress fracture of the back, sustained following the Gunners' win over arch rivals Tottenham Hotspur last weekend.
And as a result, highly-rated 20-year-old Gibbs - who has recently been touted as a future England international - is set to make his first Champions League appearance of the campaign against AZ Alkmaar on Wednesday night.
The starlet's previous European outing saw him make a crucial eighth-minute error in last season's semi-final defeat to Manchester United at the Emirates Stadium, allowing Ji-Sung Park to score.
However, Wenger insists he has no doubt that Gibbs will shine on his return to Champions League action.
"I was very comfortable to have a solution to rest Clichy when it was needed and play Gibbs," he said.
"Now suddenly there is a huge stress on Gibbs to play in every game.
"[Fabio] Capello and England will be happy because they want him to play of course, but it is still a blow for us to lose Clichy.
"I have no doubt about the quality of Gibbs, and I have said that many times."