The Ferrari ace fears Jenson Button's BAR could stand between him and yet another Formula One record in Canada on Sunday.
Ralf Schumacher won the French GP as his team celebrated their second one-two finish in the space of a week.
F1 world champion Michael Schumacher collided with Australian Mark Webber's Jaguar in the French Grand Prix pitlane.
The German intends to come back stronger than ever in front of his home fans in Nuerburgring this weekend.
The Italian swept through to take the chequered flag for his first win in 117 starts.
"We knew that from the beginning and we've sort of had confirmation by now and it will be a tough fight to the end," said the German driver.
Ferrari's Michael Schumacher has won the Spanish Grand Prix to equal the best start to a Formula One season with five wins in a row.
The world champion was 1.4 seconds faster than Jenson Button in Friday's practice for the Spanish Grand Prix.
It was the second win of Montoya's 41 race career and the first of the season for BMW-powered Williams
Ferrari can hope to equal McLaren's 1988 achievement of winning all but one of the races.
Ferrari have added Jenson Button's name to their list of candidates to take over from world champion Michael Schumacher.
The Scot is looking to get his act together in the next F1 race at Monaco and make up lost ground.
The reigning World champion gave his new Ferrari a winning debut in Spain on Sunday as title leaders McLaren were reduced to mere spectators.
They attended a discreet ceremony, with a few relatives and no public, in the small western German town of Kerpen.
Juan Pablo Montoya accused Rubens Barrichello of illegally blocking him in order to help Ferrari team mate Michael Schumacher.
The F1 ace said the electronic aids allows the driver the possibility to exploit the potential of the car.
"I think he is in the perfect position. Honestly, he has a strong car, they're very quick, very consistent," Schumacher said.
Chief Williams engineer Sam Michael said it was clear the team had some catching up to do but it was not all doom and gloom.
"I just love fighting on the circuit and it's natural to me and as long as I am competitive and the love is there," said the 35-year-old German.
The German did a blistering lap in the first qualifying session for Sunday's Malaysian Grand Prix.
Ferrari said Schumacher lapped the Italian circuit named after team founder Enzo Ferrari and son Dino in one minute 19.664 seconds.
'It's been ultimately a really great race between two different teams and it ends with a bit of a ... negative. It does kind of feel like a deflated win'
The Formula One supremo is backing Kimi Raikkonen to beat Michael Schumacher this year.
Jaguar's Mark Webber believes F1's rule changes will lessen the champions's dominance.
The Formula One world champion sees McLaren as a potential threat to Ferrari's domination this season after David Coulthard's impressive times in recent testing.
Fans who fell asleep or switched off in 2002, bored by endless Ferrari processions, stayed on the edge of their seats as Formula One ripped up the rule book and emerged reborn.
The F1 ace won the award for the third time. Croatian Alpine skiing star Janica Kostelic was voted the European Sportswoman of the Year for 2002.
The German star hurt his knee playing football for his local team near his home in Switzerland.
