 Complete the following phrase:  Riedle returned to Germany in 1993 and joined Borussia Dortmund. He was a starter for most of his spell, often partnering Stéphane Chapuisat, but failed to reproduce his previous form, never scoring in double digits; he was however important in the conquest of the 1995 and 1996 national championships 13 goals combined and, in the 199697 UEFA Champions League, netted twice against Juventus in 