The ex-Arsenal stopper believes the top division in English football has declined in comparison to the Bundesliga, with Bayern Munich and Borussia Dortmund now leading Europe
Lehmann enjoyed a five-year stint at Arsenal between 2003 and 2008 before coming out of retirement to return briefly in 2011 via a spell at Stuttgart.
But the the former Germany international feels that Bayern Munich and Borussia Dortmund have closed the gap at the top of European football, in stark contrast to the leading English sides.
"I think the duel at the top is pretty balanced, because Bayern and Dortmund have caught up a lot over the last years," he told reporters.
"And I think the English League isn't as good anymore at the top or as strong as it used to be."
Dortmund and Bayern meet in the Bundesliga directly after the international break and the 44-year-old has predicted that the game will finish in a draw, as his former club Dortmund will be eager to avoid a third straight defeat.
"Last year Arsenal has won in Munich 2-0 and lost at home 3-1," he said.
"If it wasn't for that [away goals] rule, maybe it wouldn't have gone into overtime. Dortmund has won once and lost once [against Arsenal].
"The chances of Borussia Dortmund losing three times in a row are pretty small, therefore I believe that it least it will be a draw."