Dixon tops final Detroit practice

Scott Dixon went quickest in the third IndyCar practice session around the Belle Isle street circuit. The Ganassi racer took turns with Penske rival Will Power at the top of the timing screens throughout most of the session before finally trumping the Australian with a 1m11.2845s; 0.18s better than Power could manage

Bruno Giacomelli Graham Hill Leo Kinnunen Parker Kligerman Paco Godia Hubert Hahne