LEVERKUSEN, Germany : Bayer Leverkusen delivered their most complete performance in the Bundesliga this season even though they failed to score after missing a bagful of chances on Friday in their goalless draw against visitors VfB Stuttgart, coach Xabi Alonso said. The German champions, who travel to Liverpool for the Champions League on Tuesday, overran Stuttgart from the start. They squandered more than half a dozen golden scoring opportunities with Victor Boniface, Jeremie Frimpong and