 Complete the following phrase:  However, the MP48 was competitive enough to achieve some remarkable successes. Even though rival Alain Prost was in the superior Williams FW15C, Sennas skill enabled him to lead the championship until after Canada, by winning 3 of the first 6 races, which consisted of his 2nd victory in Brazil, his 6th Monaco Grand Prix victory and one of his greatest drives in the rain-soaked 