Hamilton multiplies lead after Rosberg DNF

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UPDATED: No action taken by stewards after Mercedes is summoned to explain tyre pressure irregularities. Original result stands.

Lewis Hamilton taken a significant stride towards the 2015 Formula 1 World Championship title after strolling to a seventh victory of the season in the Italian Grand Prix at Monza, while main title rival Nico Rosberg failed to finish after his car cried enough with two laps remaining.

With many daring to dream that Ferrari could take the fight to Mercedes on home soil, Hamilton dismissed those hopes by enjoying arguably his most dominant afternoon of the year as he led from the first corner and simply extended his advantage all the way to the chequered flag.

By contrast, it was a disastrous day for Rosberg who, after spending his race trying claw back ground from a poor start that left him sixth initially, retired from third position with just two laps remaining, the 'old' Mercedes power unit giving way just short of the chequered flag. The margin between them now stands at 52 points with just seven races remaining.

Indeed, Hamilton had always looked destined to put more air between himself and his team-mate as he sprinted away out front, his cause was undoubtedly aided from the word go when Kimi Raikkonen - having qualified on his first front row since China 2013 - stalled the Ferrari, much to the disdain of the tifosi packed grandstands.

Raikkonen's loss, which at least prompted an entertaining charge from last, was team-mate Sebastian Vettel's gain as he assumed the mantle of Hamilton's biggest rival, but it was soon clear the Briton would not be giving the fans what they ultimately wanted on this occasion.

Indeed, despite pre-race fears about the reliability of the upgraded power unit following Rosberg's Saturday troubles, Hamilton was quick and consistent throughout

Instead, it was Rosberg that would count the cost of reliability problems as he faces a title challenge that is steadily slipping away. Indeed, having been forced to race with a 'compromised' engine, Rosberg nonetheless acquitted himself as best he could, despite Raikkonen's bungled start forcing evasive action that would demote him to fifth in the first stint behind both Williams'.

A rapid pit-stop turnaround though would see Rosberg leapfrog Felipe Massa and Valtteri Bottas, but as he was attempting to bridge the chasm to Vettel up ahead, his engine cried enough with little more than a lap remaining, consigning him and Mercedes to a first DNF of 2015.

His exit duly sparked up a renewed battle for the podium between the two Williams drivers, Felipe Massa coming under extreme pressure from team-mate Valtteri Bottas as they entered the last lap. The Brazilian managed to hold firm by the smallest of margins, marking a second consecutive podium at Monza.

Following his first lap dramas, Raikkonen's visibly charged climb back through the field would take him as far as fifth position, an otherwise disappointing reward on a day where only his second podium of the season was seemingly in the offing.

Unable to keep up with Williams but comfortably clear of the pack behind until Raikkonen charged him down, Sergio Perez kept it tidy for a second consecutive top six finish in sixth in the Force India.

Despite complaints about a potential exhaust problem, Nico Hulkenberg successfully rebuffed the efforts of a feisty Marcus Ericsson first and then Daniel Ricciardo, the Australian coming through to eighth place late on, leaving Ericsson to nonetheless celebrate his third straight top ten finish for Sauber.

Benefitting from Rosberg's late exit, Daniil Kvyat snatched the final point in tenth position, ahead of fellow penalised drivers Carlos Sainz and Max Verstappen. Meanwhile, the scale of McLaren-Honda's problems were evident by Jenson Button getting a great start to run ninth briefly, only to be quickly swallowed up by the pack. He finished 14th.

Following the joy of its podium success in Belgium, Lotus saw its aspirations in Italy come to an abrupt conclusion with both Romain Grosjean and Pastor Maldonado eliminated on the opening lap due to contact in the pack. For Maldonado, it marks his eighth DNF in 12 races, five of which as a result of collisions on the opening lap