Paris Saint-Germain head coach, Luis Enrique, has warned his attacking stars that they must put in a defensive shift when they host Borussia Dortmund in the second leg of their Champions League semi-final on Tuesday. The Ligue 1 champions trail 1-0 from the first leg in Germany. Enrique was asked at his pre-match news conference what he can do to help Kylian Mbappé impact the game more. Mbappe had a quiet performance at the Signal Iduna as PSG lost. Enrique replied that the France captain needs to contribute at both ends of the pitch. “As we are a team, we ask the attackers to help make sure a…