 Complete the following phrase:  The 2016 Monza GP2 and GP3 Series rounds were a pair of motor races that was held on 3 and 4 September 2016 at the Autodromo Nazionale Monza in Italy as part of the GP2 Series and GP3 Series. It was the ninth round of the 2016 GP2 Series and the seventh round of the 2016 GP3 Series. The race weekend supported the 