Mark Webber has claimed that the battle for the Formula 1 drivers' title is already over, despite there being seven rounds left to contest.
While there is a maximum of 175 points still up for grabs, Webber is adamant that Rosberg will need Hamilton to have some retirements to aid his chances of overhauling the deficit.
He told ESPN: "It's over, that's all over. Win a lot. That would be awesome if he can do that, but Lewis is in a phenomenally confident window at the moment, so that's going to be hard.
"Lewis will want to wrap it up and we don't have the double points in play in Abu Dhabi this year, so it's a big, big margin. Lewis could have the odd DNF in there, which can still happen and we saw Nico have one in Italy, but that would be what is required.
"There might be some other tracks where Ferrari come into the game, so if the points are spread around a bit more that makes it even harder for Nico to pull back that gap."
Rosberg retired in the latter stages of the Italian Grand Prix with engine failure.