The former Manchester City winger featured in Friday's opening day 8-0 thrashing of Schalke.
Sane said, "I'm very happy. The team was already at the top last year with excellent players and excellent cohesion. The boys are still hungry, even if they have won everything.
"Starting like this at home against Schalke is fantastic. It was very nice to finally play football with the boys. It was a very good day, a good match, many goals. We did not relax at all.
"Of course, I want to go full throttle, but I'm not at 10% yet, I always want to give my best, help the team play well and win."