Preparing to face Barcelona's Luis Suarez is worrying Bayern Munich, says the German champions' reserve goalkeeper Pepe Reina.
Reina and Suarez were teammates at Liverpool from 2011-2013, and their sides are set to face each other in the Champions League semifinals on Wednesday.
Suarez has shone this year in his second season since leaving Anfield, with a hat trick last weekend bringing his goal total this season to 24 in all competitions, and Reina says the success is no less than the Uruguayan deserves.
"Luis deserves it, he has fought for it," Reina told the Guardian. "He has had incredible seasons everywhere he has been and because of that, because he performed year after year, he got the move to a huge club. Maybe it took longer than it should have, because he has deserved it for a long time."
Reina said he believes Suarez's "street" mentality has been fundamental to his success.
"He's the kind of player that I especially like," the goalkeeper continued. "He's a 'street' player and I mean that as a eulogy. He's alive, he's always on the edge, pushing, he's a born winner.
"In every training session at Liverpool, I wanted to be on his team, always. He always gritted his teeth, he never, ever gave anything up for lost. I think that's a huge part of the reason that he is the player he is today.
"He finishes very well. He can produce a play in very little space, doing the kind of moves that only he would even think of. And beyond [enjoying] his talents as a player, I consider myself lucky to have been able to get to know Luis as a person. It's not just at Barcelona; I think wherever he goes he will build good relationships with his teammates because that's the kind of person he is, and that helps you to settle and integrate."
Suarez has obtained his spectacular scoring record alongside Neymar and Lionel Messi on a front line that has accounted for 108 goals.
"We're talking a lot about Suarez and he's not the only one that worries us; there are others," Reina said. "[Messi's] not bad, either."