As he reinforced his dominance on the season with a sixth win of 2013 on Sunday, Sebastian Vettel's rivals acknowledged at Monza the German is on course to be a four-time world champion.
With seven races still to run this year, the Red Bull driver's closest challenger is Fernando Alonso -- and the Spaniard's deficit is 53 points.
That means that if the Red Bull simply comes second for the rest of the year, with Alonso's Ferrari managing an unlikely seven-race winning streak, Vettel will still be champion after November's Brazil finale.
"I think we need to be realistic about the championship now -- there's a very big gap," Alonso said after finishing second in Italy.
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