greater rigidity and was cost-effective. Prost modified their cars' oil system to improve the reliability of their engines, and made minor aerodynamic changes to the front wing and the floor. The team also used an updated Peugeot A20 EV2 engine during Friday's practice sessions, and reverted to the EV3 for the rest of the weekend. BAR fitted their cars with a revised aerodynamic package which included new bargeboards and rear wings. The Williams team fitted cast titanium hub carriers to their cars, but this was not used for the race since they affected the working of the brake vents. Practice There were four practice sessions preceding Sunday's race, two one-hour sessions on Friday and two 45-minute sessions on Saturday. Conditions were dry and overcast for the Friday practice sessions, but previous rainfall and undercard events made the track dirty, which stopped all but nine drivers from setting a time and seven tried to set a quick lap. The fastest laps were recorded late in practice. Michael Schumacher led with a lap of 1:21.982 at his second attempt to set a fast time. He was half a second quicker than his teammate Barrichello in second. Häkkinen was third, Ralf Schumacher fourth and Prost's Jean Alesi fifth. The two Benetton drivers were sixth and eighth, Giancarlo Fisichella ahead of Alexander Wurz; Sauber's Johnny Herbert was seventh. Jaguar's Eddie Irvine and Verstappen were ninth and tenth. In the second practice session, Michael Schumacher was unable to lap faster but remained fastest; Ralf Schumacher set the second-fastest time with a new set of tyres towards the session's end. Barrichello was third-fastest, ahead of Jordan's Jarno Trulli, Coulthard and Williams' Jenson Button in positions four to six. Häkkinen, Pedro Diniz for Sauber, Heinz-Harald Frentzen for Jordan and Alesi followed in the top ten. Pedro de la Rosa lost control of his Arrows car under braking and got beached in the gravel trap, which briefly brought out the yellow flags. Fisichella spun 360 degrees backwards into the gravel trap at the Renault corner and had a second spin at the following right-hand turn. The weather remained dry for the Saturday morning practice sessions. Coulthard set the third session's fastest lap of 1:21.370, ahead of teammate Häkkinen, who was two-tenths of a second slower; both drivers set their fastest times on a new set of tyres. Ralf Schumacher, Michael Schumacher, Villeneuve, Fisichella and Frentzen made up positions