Mainz vs Borussia Dortmund preview - We've given Mainz enough - Klopp

Borussia Dortmund coach Jurgen Klopp says his former club Mainz should be happy enough with what they have already received from his side, and not expect anything more when the teams meet on Saturday evening.

Jonas Hofmann moved on loan to Mainz towards the end of the transfer window and Klopp, whose own affinity for the only club of his playing and coaching career before moving to Dortmund is unbroken, has told them not to get greedy.

"I wish this club really all the imaginable best, but we still want to beat them twice a year," he said at Friday's press conference.

"Anyway, they've already got Hoffi from us so they can't really expect any more than that.

"If Hofmann was still with us, then there's a high chance he would have been playing on Saturday, in Mainz, for us."

It was due to his limited opportunities, though, that the midfielder was sent to Mainz to gain more match practice.

Appearing only fleetingly, when Klopp needed to rotate his side after midweek Champions League matches, was not enough for the 22-year-old, who is now getting the regular football he wanted.

His new coach Kasper Hjulmand is hopeful that he will follow the example of Sami Allagui last week and score against his former club.

"He's 100 per cent ready to play a top game against Dortmund," Hjulmand said on his club's website.

"I have no doubt he'll give everything on Saturday. He made a good impression already against Berlin and has a good feel for our game."

Hjulmand, whose side won 3-1 at Hertha Berlin last weekend, hopes Dortmund invested too much in their Champions League win over Arsenal on Tuesday and that their energy levels will suffer as a result on Saturday.

"It was a brutally strong game from them," he said. "I had to check that my television wasn't running at double speed.

"We know exactly what we are up against. They are one of the best sides in the world; huge opponents.

"But we have faith in our own game and in our qualities and there are always opportunities in football. We go into the game with self-confidence, even if we are the rank outsiders."