MUNICH -- Arsenal will be without right-back Hector Bellerin for their Champions League trip to Bayern Munich on Wednesday.
Bellerin will miss the match in Germany with a groin injury, with Mathieu Debuchy -- who featured in last week's 3-0 defeat at Sheffield Wednesday -- set to come in.
Arsene Wenger told a news conference at the Allianz Arena on Tuesday: "Debuchy will play. I'm confident in him, I trust him. He's 100 percent educated, he trains every day, he played last week against Sheffield Wednesday and physically he should be ready."
Arsene Wenger is already without a number of first-team players through injury, including Theo Walcott, Alex Oxlade-Chamberlain, Aaron Ramsey, Jack Wilshere, Danny Welbeck, Mikel Arteta and Tomas Rosicky.
As a result, youngster Jeff Reine-Adelaide comes into the 18-man squad as cover.
"We have nobody else back," Wenger said. "It's not a big problem [for Bellerin]. He has a small groin problem. We have to wait a bit."
Arsenal need another positive result after their 2-0 victory over Bayern at the Emirates Stadium last month after losing their first two Group F fixtures to Dinamo Zagreb and then Olympiakos.
Despite beating Pep Guardiola's team, unbeaten so far in the Bundesliga, they will begin their Matchday 3 bottom of the group.
"A defeat would put us in a very bad position, that's why we don't want to lose the game," Wenger said. "We would still have a chance but it would diminish our chances. We need to get a result tomorrow night."
Wenger refused to discuss the prospect of exiting the competition in the first-round group stage for the first time since the 1999-2000 season, or finishing third and going into the Europa League.
"We want to give absolutely everything to win the game," he said. "We're not thinking at the moment about how we would deal with the Europa League."
Wenger hopes Mesut Ozil can show off his excellent Premier League form at Bayern, and praised the German World Cup winner's growing importance to his club team.
"He's developed well," Wenger said of the player he signed from Real Madrid in the summer of 2013 for £42.5m. "He's gained a lot of confidence, the World Cup helped him as well.
"In England before there were always doubts about him but I think he's a great player, a fantastic player. He's developed positively, worked very hard and I think he's at his best age. He knows the job and I think the age 27 to 32 is the best age for a player."
Ozil, who turned 27 last month, has already supplied nine assists for Arsenal in the league this season, and scored the Gunners' second goal in their defeat of Bayern two weeks ago.
He was also named the best-performing attacking midfielder in a CIES study published this week.
"We play a big game tomorrow and what you want is Ozil to continue the level of his performances until now," Wenger said. "We want a similar performance to the first game.
"We just want to do what it takes to get a positive result, we've done it before. We know what we want to do -- let's concentrate on doing that."
Bayern boss Pep Guardiola had earlier told media he expects Arsenal to adopt an attacking approach in Germany.
Provisional squad: Cech, Macey, Monreal, Gibbs, Debuchy, Chambers, Koscielny, Gabriel, Mertesacker, Coquelin, Flamini, Cazorla, Ozil, Reine-Adelaide, Iwobi, Sanchez, Campbell, Giroud.