Their 1-0 win saw Bayern reach the semis 3-2 on aggregate.
Tuchel said: "'They (Arsenal) are there.
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"For me, they are an elite team. It was a very, very close result. Maybe what they miss a little bit is a bit more experience in these knockout stages.
"I would not judge them now on this week where some of the results are a bit complicated, but in my opinion they are an elite team."
Arsenal, sitting second on the Premier League table, face Wolves this Saturday.