 Complete the following phrase:  1972 saw changes to Monza. The 1971 race was the fastest Formula One race ever at that point in time. It was really just a bunch of straights and fast corners and F1 cars had become increasingly advanced and much faster, and the drivers were constantly slipstreaming each other around the circuit. A small chicane was put at the end of the pit straight and another one at the Vialone curve; Brazilian Emerson Fittipaldi won that race and his first Drivers Championship at only 25 years of age. His chief rival Jackie Stewart went out at the start with a broken gearbox. In 1973, Stewart punctured a tire early in the race and went into the pits to have it changed; he came out in 20th place and finished fourth in the race while Fittipaldi finished second; this was enough for Stewart to win his third and final Drivers Championship. 1974 saw further changes with the Vialone chicane changed and renamed Variante Ascari, which was the place where Alberto Ascari was killed in 1955 testing a Ferrari sportscar. Like the year before, Peterson won and Fittipaldi finished second, now driving for McLaren. 