The 26-year-old made 230 appearances for Leverkusen across seven seasons in the Bundesliga and has won six caps for Germany but was not included in Joachim Low's 23-man squad for the World Cup.
Those discussions eventually led to Wilshere reaching a compromise which suited all parties, with the England global prepared to take a pay cut in order to stay on.
'I remember him [Hleb] at Stuttgart and then he played for Arsenal.More news: Thousands cheer Meghan and the Queen on their day out in Cheshire
That has left a sour note with the former German global as he appeared on his Twitter page offering a parting shot at the club he spent five illustrious years between the sticks.
Arsenal are set to complete a string of transfers in the coming weeks.
"Given this, I feel I have no option but to pursue other opportunities in order to progress my career on the pitch". I leave with memories that will stay with me forever from my time at the club.
He's by no means the finished article just yet and no doubt he'll take some time to adapt to life in the Premier League but the 6ft 3in stopper has all the potential to be a top class keeper for us for years to come.More news: Former Knick Zach Randolph’s Brother Shot Dead Outside Indiana Bar
I think the history of the club, the fans, the quality of the club and of the team is so good.
"We thank them for all their hard work and wish them all the best for the future".More news: Maradona speaks on Messi's penalty miss