Football/Champions League: Dortmund defence is key against star-studded PSG for Favre Borussia Dortmund coach Lucien Favre says how his German team defends against Paris Saint-Germain's stars such as Neymar and Kylian Mbappe will be the key to Tuesday's Champions League clash. Dortmund host PSG in the last 16, first-leg, tie at Signal Iduna Park with Brazil superstar Neymar expected to return after missing the last four games with a rib injury. IMAGES AND SOUNDBITES