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

Winston Cup

FAST FACTS
Event	Southern 500
Site	Darlington, S.C.
Schedule	Friday, qualifying (CNN/SI, 3 p.m.); Sunday, race (TNT, 1 p.m.)
Track	Darlington Raceway (egg-shaped oval, 1.366 miles, 25 degrees banking in Turns 1-2, 23 degrees in Turns 3-4)
Distance	501.322 miles, 367 laps

Last race: Tony Stewart notched his first win at Bristol Motor Speedway in six tries, holding off Kevin Harvick and Jeff Gordon in the Sharpie 500. Harvick, who won the Busch race at Bristol the previous night, was second. Gordon, the series points leader, finished third and extended his lead in the standings to 308 over Ricky Rudd.

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

Last year: Bobby Labonte, who wrecked his primary car during practice, won the rain-shortened event. Jeff Burton was second.

Fast facts: Burton won both Darlington races in 1999. ... Gordon won the event from 1995-98. ... Bill Elliott and Gordon lead drivers with five wins at Darlington. ... In 44 years of racing at Darlington, there has been a sweep of the spring-fall races nine times.

Next race: Chevrolet Monte Carlo 400, Sept. 8, Richmond, Va.

Busch

FAST FACTS
Event	South Carolina 200
Site	Darlington.
Schedule	Friday, qualifying, 1:30 p.m.; Saturday, race (TNT, 1 p.m.)
Track	Darlington Raceway (egg-shaped oval, 1.366 miles, 25 degrees banking in Turns 1-2, 23 degrees in Turns 3-4)
Distance	200.8 miles, 147 laps

Last race: Kevin Harvick overcame a two-lap deficit to win the Food City 250 at Bristol Motor Speedway. Harvick, the Busch series points leader, easily beat Jeff Green to the finish line to win the race for the second straight year and give car owner Richard Childress his 100th career NASCAR win.

Last year: Winston Cup star Mark Martin, driving in his final Busch event at Darlington Raceway, won for the second year in a row, giving him a sweep of the races last year at the South Carolina track.

Fast facts: Martin, the career leader in Busch series wins, leads all drivers with eight at Darlington. ... Chevrolet has 11 wins in 36 events at the track, Pontiac has 10 and Ford nine.

Next race: Autolite Fram 250, Sept. 7, Richmond, Va.

IRL

FAST FACTS
Event	Delphi Indy 300
Site	Joliet, Ill.
Schedule	Saturday, qualifying, Noon (ESPN2, Sunday, 2 a.m., tape); Sunday, race (ABC, 4 p.m.)
Track	Chicagoland Speedway (oval 1.5 miles, 18 degrees banking)
Distance	300 miles, 200 laps.

Last race: Al Unser Jr. won the inaugural Gateway Indy 250 in Madison, Ill. Unser earned his second IRL victory of the season and the 33rd of his open-wheel career with a fuel strategy that allowed him to stay on the track while series leader Sam Hornish Jr. was forced to pit with 10 laps remaining on the 1.25-mile Gateway International Raceway oval.

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

Last year: Inaugural event.

Fast facts: There are two races remaining this season. ... This is the IRL's sixth event on a 1.5-mile oval this season. There have been five different winners the first five races. ... Hornish leads Buddy Lazier, who has won four of the last six races, 411-366 in the standings.

Next race: Chevy 500, Sept. 16, Fort Worth, Texas.

CART

FAST FACTS
Event	Molson Indy.
Site	Vancouver, B.C.
Schedule	Saturday, qualifying, 7 p.m. (ESPN2, Sunday, 1 a.m., tape); Sunday, race (ESPN2, 6 p.m.)
Track	Concord Pacific Place Street Circuit (temporary road course, 1.781 miles, 12 turns)
Distance	160.29 miles, 90 laps

Last race: Bruno Junqueira gave car owner Chip Ganassi his first victory of the season, taking advantage of a collision by former teammates Michael Andretti and Christian Fittipaldi to win the chaotic Motorola 220 at Road America in Elkhart Lake, Wis. Junqueira became the ninth different winner in 14 races this season.

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

Last year: Paul Tracy won with Team Kool Green teammate Dario Franchitti finishing second.

Fast facts: This is the 11th year of the race, but just the third with this track setup. ... Mauricio Gugelmin earned his only CART win at the 1997 race. ... No driver has led every lap of the race.

Next race: German 500, Sept. 15, Lausitz.

Formula One

FAST FACTS
Event	Belgian Grand Prix.
Site	Spa-Francorchamps.
Schedule	Saturday, qualifying (Speedvision, 7 a.m.); Sunday, race (Speedvision, 8 a.m.)
Track	Spa-Francorchamps (road course, 4.329 miles)
Distance	190.476 miles, 44 laps

Last race: Michael Schumacher won his fourth Formula One championship and matched Alain Prost's series record of 51 victories by taking the Hungarian Grand Prix. With teammate Rubens Barrichello finishing second, the Italian Ferrari team also won the constructors' title for the second consecutive year. Schumacher, a winner in seven of 13 races this season, moved into a second-place tie with Prost for career F1 titles. Juan Manuel Fangio leads with five.

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

Last year: Mika Hakkinen passed Schumacher with four laps left to win.

Fast Facts: The Ardennes forest circuit is 60 miles from Schumacher's hometown of Kerpen, Germany. He made his first F1 start in the 1991 race, and raced to his first career victory at the track in 1992. Schumacher was disqualified because of a technical violation after finishing first in 1994. ... In 1998, 12 cars slammed into each other in a first-lap pileup during a rainstorm.

Next race: Italian Grand Prix, Sept. 16, Monza.

NHRA

FAST FACTS
Event	U.S. Nationals.
Site	Clermont, Ind.
Schedule	Saturday, qualifying (ESPN2, noon); Sunday, qualifying (ESPN2, 1 p.m.); Monday, eliminations (ESPN, 4 p.m.)
Track	Indianapolis Raceway Park

Last event: Larry Dixon and Ron Capps gave team owner Don "The Snake" Prudhomme a pair of victories in the Colonel's Truck Accessories NHRA Nationals at Brainerd International Raceway. Dixon won in Top Fuel, Capps in Funny Car. Three-time Top Fuel champion Gary Scelzi and John Smith were involved in a spectacular crash in the first round of eliminations. Smith had fractures to his left arm, leg and wrist. Scelzi was not injured. Bruce Allen (Pro Stock) and Antron Brown (Pro Stock Motorcycle) also were winners.

Last year: Tony Schumacher raced to his first U.S. Nationals victory, beating Gary Clapshaw in the Top Fuel final. Jim Epler (Funny Car), Jeg Coughlin (Pro Stock), Antron Brown (Pro Stock Bike) and Bob Panella (Pro Stock Truck) also earned their first U.S. Nationals victories.

Fast Facts: This is the 500th event in NHRA history. ... The event was first held in 1961. ... For the 10th consecutive year, John Force is the top seed for the Budweiser Shootout, a special event for Funny Cars.

Next event: Keystone Nationals, Sept. 16, Mohnton, Pa.

Craftsman Trucks
Last race: Greg Biffle gave Ford its first victory of the year in the series at the Chevy Silverado 200 in Nazareth, Pa. Biffle, who won the 200-mile race two years ago, erased his own record in leading the final 192 of 200 laps over the triangular, 1-mile layout at Nazareth Speedway.

Next race: Kroger 200, Sept. 6, Richmond, Va.