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

Monaco Notables

• Webber/Yoong: Seeing the Minardi duo at the top of the Qualifying Differentials charts has become a given this year. However, the battle under them is very close, much closer than in previous years. Watch this space for changes, as they say...

• Heidfeld: Not only was Nick Heidfeld beaten by teammate Felipe Massa for the second time this year, but he also had his worst grid position since... Monaco last year, when he was 16th.

• Setting the Record Straight: Allan McNish set his best qualifying position in Monaco - 10th.

• The excuses: The universal excuse after qualifying was - Traffic.

• Changes since Austria: None.