 Complete the following phrase:  Monzas banking had been built over and only the road circuit was used, which had been modified slightly. The new long, fluid final corner was now two around 90-degree corners. 1949 saw Italian new-boy Alberto Ascari, son of the late 1924 Italian Grand Prix winner Antonio Ascari, win in his Ferrari; Enzo Ferrari was now building his own cars instead of running Alfa Romeos. 