Here's a breakdown of this weekend's action in the world of motorsports. (All times ET)

Winston Cup

FAST FACTS
Event	Virginia 500
Site	Martinsville, Va.
Schedule	Friday, qualifying (Fox Sports Net, 3 p.m.); Sunday, race (Fox, 12:30 p.m.)
Track	Martinsville Speedway (oval, 0.526 miles, 12 degrees banking)
Distance	500 laps, 263 miles.

Last race: Matt Kenseth won Monday's rain-delayed Samsung/RadioShack 500 at Texas Motor Speedway. Kenseth only had five laps of practice on Friday after blowing his engine and none on Saturday because of rain.

	Drivers to Watch
	Check out a short list of drivers to keep an eye on this weekend at Martinsville.

Last year: Dale Jarrett employed the supertire strategy, using fresher rubber to pass teammate Ricky Rudd with five laps to go and winning the Virginia 500.

Fast Facts: Jeff Gordon snapped a 14-race slump without a top-five finish by placing second in Monday's race. ... Kenseth has five top-10 finishes in seven starts this season. ... Jarrett's victory last year was his first in 30 career starts in Martinsville. ... The 1999 fall race at Martinsville was the first time there had been only one pit road. ... Four drivers _ Jarrett, Mike Skinner, Stacy Compton and Mike Bliss _ made Winston Cup debuts in Martinsville. ... Lee Petty won the 1959 race from the 24th starting position. ... There have been six different winners in the last six years. ... Rusty Wallace won five of the seven races at Martinsville from 1994-96.

Next race: Talladega 500, April 21, Talladega, Ala.

Formula One

FAST FACTS
Event	San Marino Grand Prix
Site	Imola, Italy.
Schedule	Saturday, qualifying, (Speedvision, 7 a.m.); Sunday, race, (Speedvision, 7:30 a.m.)
Track	Enzo and Dino Ferrari Autodrome (road course, 3.057 miles, 15 turns).
Distance	189.906 miles, 62 laps.

Last race: Michael Schumacher escaped a first-lap crash unscathed and went on to win the Brazilian Grand Prix on March 31, his second victory this season. Ralf Schumacher, who beat his brother at Kuala Lumpur the previous week, mounted a late challenge and finished .588 seconds behind for second.

	Drivers to Watch
	Check out a short list of drivers to keep an eye on this weekend at Imola.

Last year: Ralf Schumacher ended a 3½-year drought for his Williams-BMW team, winning the San Marino Grand Prix for his first career victory.

Fast facts: Michael Schumacher's 1999 win gave Ferrari its first victory in the San Marino Grand Prix since 1983. He has placed in the top two in five of the last six races at Imola, but did not finish last year's race. ... Roland Ratzenberger and Brazilian star Ayrton Senna were killed in the 1994 race. ... David Coulthard has taken the pole twice in the last four years, but has not won in Imola since 1998. ... Jacques Villeneuve celebrated his 31st birthday April 9. ... The track was dedicated to the memory of Dino Ferrari in 1970, with Enzo's name added to its official title after his death in 1988.

Next race: Spanish Grand Prix, April 28, Barcelona.

CART

FAST FACTS
Event	Toyota Grand Prix
Site	Long Beach, Calif.
Schedule	Friday, qualifying, 4:40 p.m.; Saturday, qualifying, 4:45 p.m.; Sunday, race (FOX, 3:30 p.m.)
Track	Long Beach Street Circuit (temporary road course, 1.968 miles, 11 turns.
Distance	90 laps, 177.12 miles.

Last race: Cristiano da Matta ran a nearly flawless race to successfully defend his Monterrey Grand Prix title on March 10. The Brazilian has three straight CART victories.

	Drivers to Watch
	Check out a short list of drivers to keep an eye on this weekend at Long Beach.

Last year: Helio Castroneves fought off Cristiano da Matta to win the Toyota Grand Prix. The two Brazilians put on a sensational show in the last half of the race, with Castroneves holding off da Matta by 0.534 seconds.

Fast facts: A win by da Matta this week will tie the CART record for consecutive wins. Al Unser Jr. (1990) and Alex Zanardi (1998) hold the record with four. ... Christian Fittipaldi has not won since the 2000 season-ending race at California Speedway. ... Castroneves won from the pole last year, the first driver to do so at Long Beach since Unser Jr. in 1990. ... The best finish for a Toyota was third, in 2000 by Jimmy Vasser. ... Mario Andretti won the first four events at Long Beach (1984-87). ... Paul Tracy owns the track record for fastest winning speed by going 82.626 mph in 2000.

Next race: Bridgestone Potenza 500, April 27, Motegi, Japan.

NHRA

FAST FACTS
Event	O'Reilly Nationals
Site	Baytown, Texas.
Schedule	Friday, first-round qualifying, 3:15 p.m.; Saturday, second-round qualifying (ESPN2, 7:30 p.m., tape); Sunday, final eliminations (ESPN2, 8 p.m., tape)
Track	Houston Raceway

Last race: Larry Dixon won the Top Fuel category for the third time this season at the SummitRacing Nationals at Las Vegas. Gary Densham defeated Tommy Johnson Jr. in the Funny Car final while Ron Krisher won in Pro Stock.

Last year: Del Worsham outraced John Force to get the fourth victory of his career at the O'Reilly Nationals. Mike Dunn, Warren Johnson, Angelle Savoie and Randy Daniels also won in the finals.

Fast facts: Force was denied his 100th career victory once again last week in Las Vegas by losing to Worsham in the second round of the Funny Car category. Force has not won since the season-opening Winternationals on Feb. 10. ... Force recorded the 109th top qualifying effort of his career and third of the season during last week's event. ... Top Fuel driver Doug Herbert became the first NHRA driver to win the $100,000 sponsor bonus at the event in 1999. ... Records were set in four of the five professional classes at the 1999 event.

Next race: Mac Tools Nationals, April 28, Bristol, Tenn.

Busch

FAST FACTS
Event	Pepsi 300
Site	Gladeville, Tenn.
Schedule	Friday, qualifying, 1 p.m.; Saturday, race, (Fox, 4 p.m.)
Track	Nashville Superspeedway (tri-oval 1.33 miles, 14 degrees banking)
Distance	300 miles, 225 laps.

Last race: Jeff Purvis won the O'Reilly 300, leading only the last six laps under caution after he took just two tires on his final pit stop and was in front when rain ended the race. It was Purvis' fourth career victory.

Last year: Greg Biffle raced to his first Busch Series victory, holding off Jason Keller in the Pepsi 300 at Nashville Superspeedway.

Fast facts: Biffle won last year's race while making his eighth start since moving up from the Craftsman Truck Series. Only Johnny Rumley, who triumphed in his seventh start in 1993, has won more quickly in this series. ... Points leader Jeff Green will not race this week. Green, who finished fifth last week, holds a 23-point lead over Jack Sprague in the standings. ... The top seven finishers in last week's race drove Chevrolets. ... The track replaced Nashville Speedway, where a Busch event has been held since 1984.

Next race: Talladega 300, April 20, Talladega, Ala.

Craftsman Trucks

FAST FACTS
Event	Advance Auto Parts 250
Site	Martinsville, Va.
Schedule	Friday, qualifying, 1:30 p.m.; Saturday, race (ESPN2 2 p.m.)
Track	Martinsville Speedway (oval, 0.526 miles, 12 degrees banking.
Distance	250 laps, 131.5 miles.

Last race: Ted Musgrave passed Robert Pressley with 12 laps to go, then held him off to win the Craftsman Anniversary 200 at Darlington Raceway on March 15.

Last year: Scott Riggs passed up a tire-change stop to take the lead with 108 laps to go and made the same rubber last for 151 laps in winning the Advance Auto Parts 250.

Fast facts: Three-time Winston Cup champion Darrell Waltrip will end his 17-month retirement in this race. ... In seven races at Martinsville, there have been no repeat winners. ... Only Rich Bickle has won from the pole. ... No series winner has won at Martinsville. ... Dennis Setzer made his lone Winston Cup start at Martinsville in 1998.

Next race: Busch 200, May 5, Madison, Ill.

IRL
Last event: Points leader Sam Hornish Jr. edged Jaques Lazier by .0281 seconds -- the second-closest finish in IRL history -- to win the Yamaha Indy 400 on March 24.

Next event: Nazareth Indy 225, April 21, Nazareth, Pa.