Former Arsenal goalkeeper Jens Lehmann has been the subject of some controversy amongst his old fans recently, and he has now added more fuel to the fire. The German was a legendary goalkeeper for the Gunners, as the shot-stopper for the Arsenal Invincibles side which won the Premier League title undefeated. However, in recent weeks he has trademarked the term “Invincibles” in a surprise move, preventing Arsenal from using it, whilst he has also criticised Mikel Arteta’s decision to bring in David Raya to replace Aaron Ramsdale in goal. Lehmann has now criticised Arteta again, and has explaine…