Arsenal goalkeeper Manuel Almunia will miss Tuesday's Champions League trip to Partizan Belgrade with an elbow injury.Almunia, who was at fault for two goals as the Gunners lost 3-2 at home to West Brom in the Premier League on Saturday, will be replaced by Lukasz Fabianski. [LNB]"The whole squad was very low after the weekend but I believe we will play well on Tuesday," said boss Arsene Wenger. [LNB]The Gunners are still without Cesc Fabregas, Theo Walcott and Robin van Persie, all out with injuries. [LNB]Full-back Kieran Gibbs will undergo a fitness test on Monday before the Arsenal squad flies out to Belgrade. [LNB]Arsenal started their European campaign with a 6-0 home win against Braga and Wenger, who says he would not have dropped Almunia had he been fit, is looking for a quick response to Saturday's calamitous defeat. [LNB]"There is always an easy target, an easy scapegoat," added the Gunners manager. "But I believe we win together and we lose together.[LNB] There is only one way to show confidence in a player and that is to put him on the pitch and give him his chance Arsene Wenger on Fabianski "Even if people think Manuel made a mistake on the second goal, we made a few before that as well as a team, so we all have to stand up for what happened. [LNB]"Manuel is very low, he was disappointed to have lost the game. Everyone felt the same, because we had a good opportunity and we didn't take it. [LNB]"But we are a good side and we will bounce back and I think we will have a good game in Belgrade." [LNB]Almunia's injury gives Fabianski another chance to stake his claim to be Arsenal's first-choice goalkeeper. [LNB]The Pole played in last week's 4-1 Carling Cup victory over Tottenham but was beaten by a relatively tame strike from Robbie Keane as Spurs equalised to send the match into extra-time. [LNB]"I believe in his talent," said Wenger. "He gets another opportunity to show how good he is. [LNB]"There is only one way to show confidence in a player and that is to put him on the pitch and give him his chance." [LNB]Partizan, who lead the Serbian championship, drew 0-0 with Spartak Subotica on Sunday having lost their first game in the group stage of the Champions League 1-0 at Shakhtar Donetsk.[LNB] Wenger has made some poor decisions in his time but this goalkeeping situation takes some doing DaSilvaSurfer They will be looking to Serbian international midfielder Sasa Ilic and Brazilian-born striker Cleo to do the damage at the Stadion FK Partizan. [LNB] "What I expect is for Partizan to play a highly passionate game and to try to catch us on the break," said Wenger. [LNB] "They have the traditional strengths of Serbian teams - they are intelligent, with a good technique and in the final third, if you give them room they are always dangerous. [LNB]"Overall what I believe is the most dangerous for us is that they win the duels, play at a high pace and we are not prepared for that. [LNB] "I believe the collective drive that they have going forward could be dangerous for us."