The 22-year-old signed for Spurs from Schalke in January, and has made only nine appearances.
"In the summer, with my first pre-season and hopefully the tailwind of a successful Under-21 European Championship, I want to win a place on the [Spurs] team," he told German magazine Kicker.
"I am under contract until 2018. I have trust in myself and will establish myself there. And if I show what I am capable of in the top level, I have good chances for the Germany senior team.
"The game is faster [in England], it constantly goes up and down. There is also more respect between coaches and players, but also for the referee.
"It's easier to work on those little things in training, as there are no media or fans at the training ground," he said.
"This enables you to work totally professional."