 Complete the following phrase:  Michael Andretti left the team to pursue an opportunity in Formula One for 1993 and was replaced by English driver Nigel Mansell who arrived on the CART circuit with much fanfare. In his rookie season, Mansell, the Formula One World Champion, won five races and had ten top-3 finishes, clinching the 1993 CART title to become the only driver in history to hold both the Formula One and Champ Car titles at the same time. Mario Andretti also returned to victory lane, winning what would be his final Indy car victory at Phoenix. Both Mansell and Andretti were strong contenders at 