An injury scare to Bundesliga top scorer Robert Lewandowski is unlikely to derail unbeaten Borussia Dortmund’s focus ahead of their Champions League semi-final first leg against Real Madrid tonight as they bid for their first final spot since 1997.

Poland international Lewandowski, who scored for a 12th consecutive league game in their 2-0 win against Mainz on Saturday, picked up a knock on his thigh but said he hoped to be fit in time for the match in Dortmund.

Lewandowski is Dortmund’s most prolific scorer in Europe this season with six goals and two assists in 10 games.

“The game against Mainz was strange because we also kept thinking of the Real game. I want to score at least one goal every time I play and if I can achieve that against Real then even better,” he said.

For coach Juergen Klopp’s young team, which won consecutive Bundesliga titles in 2011 and 2012, it is a career highlight, with the 1997 Champions League winners back in the last four for the first time in 15 years.

“This is the biggest game so far that my boys will have to play,” Klopp told reporters.

The last time they reached this stage – in 1998 – it was Real who eliminated them en route to the title.

The nine-time European champions are no strangers to Dortmund this season either with the Germans beating them in Germany and Real escaping with a last-gasp 2-2 draw in Spain in the group stage.

With central defender Mats Hummels and Jakub Blaszczykowski gradually hitting top form after their injury breaks, Klopp has a full squad to choose from.

“We are ready to give it everything we have against the biggest club in the world because if you reach the semi-final then you want to get into that final,” Klopp said.

Real’s 3-1 La Liga victory at home to Real Betis on Saturday came at a cost, with full-back Marcelo and midfielder Luka Modric picking up muscle injuries.

Goalkeeper Diego Lopez and forward Karim Benzema complained of knocks but assistant coach Aitor Karanka said neither seemed serious.

With right-back Alvaro Arbeloa suspended, coach Jose Mourinho will have to shuffle his defence and is likely to switch Sergio Ramos over to replace his Spain team-mate and bring Raphael Varane into the middle alongside Pepe.

Still only 19, the pacy and athletic Varane, who was introduced to the club by Zinedine Zidane, has impressed with a series of mature performances this season, particularly against Real’s arch-rivals Barcelona.

“This is a key position, and you must bring some security, that’s very important,” Varane said.

“You must also communicate well and have a good sense of positioning. In this position you play a lot with your head, you have to think a lot, these are important skills to possess.

“We have seen that they (Dortmund) are a very good team. They have not reached the semi-finals by chance, we saw in the group phase that they have a quality squad. We will need to be strong and play very well.

“It’s true that they are a team who switch into attack very fast, they love attacking.

“That is our game as well, so those are always nice games to follow.”

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