Championship leader Lewis Hamilton achieved his 40th career Formula 1 victory at Monza despite late drama which affected his team-mate Nico Rosberg in a fiery retirement.
The Mercedes driver made a clean getaway to lead away from pole, while Rosberg slipped back to sixth. As for Kimi Raikkonen, it was a dreadful start as his Ferrari made a really slow start from the front row.
Hamilton dominated the race from there, but with a few laps remaining, he was told by his team that he needed to push without being given a reason for doing so.
Hamilton did as he was told and took the chequered flag with a 25-second lead over Ferrari’s Sebastian Vettel.
After the race Mercedes was referred to the race stewards because its tyres were measured below Pirelli’s 19.5psi guideline on the grid just before the Italian Grand Prix.
Meanwhile, there was more drama for Mercedes as Rosberg’s engine expired with a few laps to go when he was running third and catching Vettel.
It was the first mechanical retirement for Mercedes this season and comes after Rosberg had to revert to an old-spec power unit, which had done six races, after an issue with his upgraded engine.
It means Hamilton, who secured his seventh win of the season, now leads Rosberg by 53 points in the championship with seven races left.
Felipe Massa inherited third, with his Williams team-mate Valtteri Bottas fourth and Raikkonen fifth after a strong recovery drive.
Force India’s B-spec car continued to impress with Sergio Perez following up his fifth place finish at Spa with sixth at Monza, one position clear of team-mate Nico Hulkenberg.
It moved the Silverstone-based team back ahead of Lotus into fifth place in the constructors’ championship, after the Enstone-based team’s race lasted just a couple of laps.
Romain Grosjean and Pastor Maldonado both suffered contact at Turn 1, with Grosjean pulling off track and Maldonado recovering to the pits and parking the car in the garage.
Red Bull Racing’s Daniel Ricciardo recovered from starting P19 after a 25-place grid penalty for changing engine elements to finish eighth with team-mate Daniil Kvyat tenth.
Sauber’s Marcus Ericsson scored points for the third successive race with ninth.
Carlos Sainz Jr just missed out of points in P11, one position ahead of Toro Rosso team-mate Max Verstappen, who started last and had to serve a drive-through penalty as punishment for his team releasing his car without its bodywork secure in qualifying, P12.
Felipe Nasr was P13 for Sauber ahead of McLaren’s Jenson Button, who made a superb start to rise from P15 to ninth before dropping back.
The Manors of Will Stevens and Roberto Merhi brought up the rear with McLaren’s Fernando Alonso retired with three laps to go.
Italian Grand Prix, race results after 53 laps:
1 Lewis Hamilton Mercedes 1:18:00.688
2 Sebastian Vettel Ferrari +25.042s
3 Felipe Massa Williams-Mercedes +47.635s
4 Valtteri Bottas Williams-Mercedes +47.996s
5 Kimi Raikkonen Ferrari +68.860s
6 Sergio Perez Force India-Mercedes +72.783s
7 Nico Hulkenberg Force India-Mercedes +1 lap
8 Daniel Ricciardo Red Bull-Renault +1 lap
9 Marcus Ericsson Sauber-Ferrari +1 lap
10 Daniil Kvyat Red Bull-Renault +1 lap
11 Carlos Sainz Toro Rosso-Renault +1 lap
12 Max Verstappen Toro Rosso-Renault +1 lap
13 Felipe Nasr Sauber-Ferrari +1 lap
14 Jenson Button McLaren-Honda +1 lap
15 Will Stevens Marussia-Ferrari +2 laps
16 Roberto Merhi Marussia-Ferrari +2 laps
17 Nico Rosberg Mercedes DNF
18 Fernando Alonso McLaren-Honda DNF
– Romain Grosjean Lotus-Mercedes DNF
– Pastor Maldonado Lotus-Mercedes DNF
1 Lewis Hamilton 252
2 Nico Rosberg 199
3 Sebastian Vettel 178
4 Felipe Massa 97
5 Kimi Raikkonen 92
6 Valtteri Bottas 91
7 Daniil Kvyat 58
8 Daniel Ricciardo 55
9 Romain Grosjean 38
10 Sergio Perez 33
11 Nico Hulkenberg 30
12 Max Verstappen 26
13 Felipe Nasr 16
14 Pastor Maldonado 12
15 Fernando Alonso 11
16 Carlos Sainz 9
17 Marcus Ericsson 9
18 Jenson Button 6
19 Roberto Merhi 0
20 Will Stevens 0
1 Mercedes 451
2 Ferrari 270
3 Williams-Mercedes 188
4 Red Bull-Renault 113
5 Force India-Mercedes 63
6 Lotus-Mercedes 50
7 Toro Rosso-Renault 35
8 Sauber-Ferrari 25
9 McLaren-Honda 17
10 Marussia-Ferrari 0