The Mercedes pair have been dominant this year, but Hamilton is the form man after winning four races in succession. Rosberg’s only victory came at the season-opening Australian Grand Prix, where pole-sitter Hamilton suffered a terminal engine problem on the opening lap.
Since then Hamilton has been unassailable, and seized the world championship lead with victory in yesterday’s Spanish Grand Prix. He also holds a clear qualifying advantage with four poles this season to Rosberg’s one.
But despite the stats, the German has brushed aside any suggestion that Hamilton holds a psychological advantage.
"Break me down mentally? I think he will struggle with that one,” said Rosberg after finishing second in yesterday's race. "He has the momentum. There is no way round that. I have to try to break it."
Rosberg also believes that he was on the verge of attacking Hamilton for victory in Spain.
"I wasn't close enough but with one more lap I would have been,” he reflected afterwards. I'm a bit gutted."
The history books suggest Rosberg will need to end Hamilton’s run quickly if he is to challenge the Brit: no driver has ever won five successive races and not gone on to claim the world title. Hamilton will look to do that in Monaco later this month, but Rosberg will be confident of ending his team-mate’s winning streak in the Principality having taken victory there 12 months ago.