The 41-year-old has rejoined his old club on a monthly rolling contract to aid an injury crisis after Wojciech Szczesny joined Lukasz Fabianski and Vito Mannone in the treatment room.
Lehmann is set to provide experienced back-up to Manuel Almunia, whom he duelled for the number one jersey before leaving in 2008, and will be on the bench at West Brom today.
The former German international played in every one of Arsenal’s 38-match unbeaten run to the title in 2003/2004 as well as lifting the 2005 FA Cup and helping the team reach the Champions League final in the following season, where he was sent off after just 18 minutes.
Lehmann is looking forward to helping the squad anyway he can as they look to recover from the bitter disappointment of defeat in the Carling Cup final at Wembley before then crashing out of both Europe and the FA Cup.
“I have got that — in terms of experience, I am still good, so I need to give that onto the young lads,” Lehmann said.
“I hope we will be successful in getting the trophy, to give that extra bit of conviction to the players — that is why I am here.”
Arsenal currently trail leaders Manchester United by three points but have a game in hand. Manager Arsene Wenger believes it is now a straight two-horse race for the Premier League crown.
“If we do not do it, it will be Manchester United because certainly the other teams are too far away,” he said.
“The other teams can only come back if Arsenal or Man United do not take their opportunities, so it is down to our results.”
Meanwhile, Abou Diaby has been ruled out of the Gunners’ trip to the midlands today because of a groin injury.