sentences:  Inter had high hopes going into the 1999–2000 season with their attack including Ronaldo and Italian stars Roberto Baggio and Christian Vieri.However, on 21 November 1999, during a Serie A match against Lecce, Ronaldo felt his knee buckle and was forced to limp off the field.A medical examination confirmed that the striker had ruptured a tendon in his knee and would require surgery.