second behind team mate Nuvolari and third at Germany's Großer Preis von Deutschland. However, with co-driver Amadeo Bignami, he won the gruelling Mille Miglia and wound up the 1932 season finishing second overall to Nuvolari for the European Drivers Championship. When Alfa Romeo decided to withdraw from racing after the 1932 season and sold its cars to Enzo Ferrari, Borzacchini rejoined the Maserati team. United with Luigi Fagioli and Giuseppe Campari, in March 1933 he picked up where he had left off the previous year, finishing second to Nuvolari at the Grand Prix of Tunisia. In April he took another second at the Monaco Grand Prix, this time to the Bugatti of Achille Varzi and then earned a third-place finish at the Avusrennen in Germany, also won by Varzi. At the 1933 Targa Florio, held at the Circuito Piccolo delle Madonie, Borzacchini set the pace with the fastest lap but an accident forced him out of the race. Death 10 September 1933 at the Autodromo Nazionale Monza was one of the blackest days in racing history. The Italian Grand Prix was held in the morning without serious incident, and was won by Luigi Fagioli. In an effort by the organizers to attract the largest possible crowd, another event called the Monza Grand Prix, using only the banked oval circuit, was staged in the afternoon. On a track dampened by a light drizzle, Borzacchini was vying with his team-mate Giuseppe Campari for the lead when Campari's vehicle slid on a patch of oil and crashed over the top of the banking and went into the trees, killing him. Borzacchini tried unsuccessfully to avoid the oil, and his car spun down to the infield and rolled over. Borzacchini was taken to the hospital, where he died later that day. After race officials restarted the event the third tragedy of the day occurred when the car of Polish driver Count Stanislas Czaykowski blew the engine, caught fire and crashed at the same location, burning him to death. During his years of racing, Borzacchini participated in more than one hundred events. Although his number of victories is considerably less than some of the other Italian racing notables, he was much loved and respected by his countrymen. In his honor, the circuit in Magione in the Province of Perugia in Umbria, not far from where he was born, was named the "Autodromo Mario Umberto Borzacchini".