Dortmund's Kovac wary of superstar Ramos and aggressive Monterrey

Former Real Madrid captain and four-time Champions League winner Ramos, 39, is Monterrey's defensive leader and Kovac highlighted the Spaniard's will to win and Monterrey's aggression

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Borussia Dortmund will have to overcome “superstar” Sergio Ramos and his winning mentality to reach the Club World Cup quarter-finals on Tuesday, said the German team's coach Niko Kovac.

Former Real Madrid captain and four-time Champions League winner Ramos, 39, is Monterrey's defensive leader and Kovac highlighted the Spaniard's will to win and Monterrey's aggression.

“He's a superstar you know,” Kovac told a news conference Monday ahead of the last 16 clash against the Mexican side.

“All the players that are playing so long... it shows their mindset. They are winners, they want to win in every single training session, every single game, they want to be on the top level with every single pass in training,” continued the Croatian.

“He's a leader, as a leader you want to be as long as possible on a high stage. It’s a little bit funny I'm now a coach and he's still a player -- but I think he will become a coach.”

Ramos will do battle with Dortmund striker Serhou Guirassy, who excelled this season and finished as the joint-top goalscorer in the Champions League with 13 strikes.

The Guinea international is looking forward to taking on Ramos.