Borussia Dortmund right-back Lukasz Piszczek has insisted that it was important for the German side to maintain their focus in the 4-2 away win against Zenit St Petersburg on Tuesday night.

Piszczek said that he felt the home side's goals were both fortuitous and that the most important thing was that they managed to recover from the 3-0 defeat to Hamburger SV at the weekend.

"We had quite a good start with the two goals and that made life a bit easier for us," he told UEFA.com. "But we were also very focused the whole time and were a bit unlucky to concede those two goals.

"I don't think we were lacking concentration when we conceded, those two goals were a bit of a fluke for Zenit. We stood up well and were unlucky in those situations. We did well and I hope we play as well in the return leg.

"We had to show a reaction after that match in Hamburg, as there were a lot of mistakes. It was not good for us, but we knew we had a very important match coming up and strongly focused on getting a very good result. We managed that."

Robert Lewandowski scored twice in the game.