 Complete the following phrase:  Heidfeld started the 2007 season strongly. In Bahrain, he chased down and overtook reigning world champion Ferdo Alonso around the outside, finishing half a minute ahead of his BMW teammate Kubica. He scored three fourth places in the opening three races, a sixth in Monaco, and a second place at the Canadian Grand Prix, where he also out-qualified both Ferraris, equalling his best ever Grand Prix finish. After retiring from fifth place at Indianapolis, he was outscored by teammate Kubica at both Magny-Cours and Silverstone. At an eventful 