WARSAW, April 25 (Reuters) – Borussia Dortmund striker Robert Lewandowski played down his stunning one-man demolition of Real Madrid, saying he had played better than Wednesday’s four-goal masterclass. The Poland international scored all his team’s goals in a 4-1 win over the nine-times champions in their Champions League semi-final first leg. “In the second half Real Madrid did not know how they should play, at some moments they were helpless,†Lewandowski told the Polish pay-TV platform nc+. “We took the first step (towards the final). “I felt confident, but there were even better matches. …