For the fifth year running, Atlas F1 is going to keep an eye on the battle between teammates throughout the season with a simple measurement: we compare the qualifying times of each driver against his teammate's result. After every Grand Prix, we will show how teammates have fared up against each other, and where they are overall since the beginning of the season. At the end of the season, the World Champion of Qualifying Differentials will be elected - the driver who beat his teammate by the most seconds. Only those who participate in at least 15 of the 17 rounds are eligible for the coveted crown; and for those who made the efforts and participated in all 17 races, the best and worst result will be scrapped.

With eight qualifying sessions completed for 2002, the differentials are once again on a roll! Let's see which drivers deserve bragging rights.

Canada Notables

• The Gap: The overall trend so far this season is that the average gap in every qualifying session has been smaller than last year's, perhaps evidence that the teams do a good job in putting two equal cars on the grid.

• Setting the Record Straight: With Enrique Bernoldi outqualifying Heinz Harald Frentzen this weekend, only Mika Salo and Mark Webber remain unbeaten by their teammates this year.

• The excuses: Ralf Schumacher and Takuma Sato had to use their T-car.

• Changes since Monaco: Jarno Trulli has moved ahead of teammate Jenson Button.