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

Europe Notables

• The Gap: The Minardi duo of Mark Webber and Alex Yoong continue to feature at the top of both the GP chart and the overall chart, but in the European Grand Prix Webber had company of Arrows's Heinz Harald Frentzen and BAR's Olivier Panis who also beat their teammates, Enrique Bernoldi and Jacques Villeneuve respectively, by a gap of over a second - much more than the average.

• The excuses: Jacques Villeneuve was unhappy with his new chassis.

• Changes since Canada: Olivier Panis is now ahead of Jacques Villeneuve.