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

Brazil Notables

• Yoong: Not really surprising, but Alex Yoong is not proving a match for Mark Webber, and the Minardi pair are heading by quite a margin the overall qualifying differentials table. Are we seeing a QD Championship walkover in the making?...

• Setting the Record Straight: McLaren's Kimi Raikkonen once again equaled his best qualifying position ever.

• The Excuses: Both Takuma Sato and Rubens Barrichello lost their fastest time of the session due to penalties. However, the latter Brazilian has the best excuse to date: he was driving the old F2001 while his teammate ran with the new F2002...

• Changes since Australia: Jarno Trulli has now moved to overall faster than teammate Jenson Button.