 Complete the following phrase:  An improvement in form came at the Italian Grand Prix where the cars ran without wings and Goodyear brought their new G9 specification tyre. McLaren qualified on the front row and led to begin with until he slowed at the scene of an accident and was caught by Stewart, Hulme and Jo Siffert in a Lotus. A slipstreaming battle ensued; McLaren retired with an oil leak at mid-distance but Hulme went on to win. From the 