Borussia Dortmund coach Jurgen Klopp knows Champions League opponents Manchester City are eyeing off several of his stars.

The Dortmund manager revealed City were one of the clubs watching players like Robert Lewandowski, Mats Hummels and Mario Gotze.

And that, he said, means Mancini will know exactly what to expect when Dortmund line up at the Etihad Stadium tonight.

"I'm sure that City respect us," said Klopp. "They are quite often at our ground. We won't be a surprise."