Lewandowski faces "hard moments" ahead of El Clasico

WARSAW, March 17 (Xinhua) -- FC Barcelona striker Robert Lewandowski emphasized that he is looking forward to Sunday's game against Real Madrid but admitted that last weeks were "very difficult for him."

Lewandowski, who suffered a hamstring strain recently, played in the match against Athletic Bilbao in previous round but his form is in big question. The Poland captain has been waiting for a goal in the domesti