A federal court has denied sprinter Justin Gatlin's appeal to run in the U.S. Olympic track trials this weekend.

The 11th U.S. Circuit Court of Appeals in Atlanta said yesterday that Gatlin had not shown he met the "applicable standard for such an injunction."

Earlier this month, the Court of Arbitration for Sport upheld a four-year ban against Gatlin for doping violations, but the defending Olympic champion in the 100 meters went to federal court seeking to run in the trials starting tomorrow.

Gatlin said he had been discriminated against under the Americans With Disabilities Act because his first doping violation was for taking prescribed medication to treat attention deficit disorder.

The U.S. Olympic Committee and the U.S. Anti-Doping Agency argued that federal courts did not have jurisdiction in the case, an argument U.S. District Judge Lacey Collier agreed with Tuesday when he withdrew the temporary restraining order he had granted a week earlier.

Pistorius gets extension. The manager for Oscar Pistorius said the deadline for the double-amputee runner to qualify for the Beijing Olympics has been extended.

Peet van Zyl said the South African athletics federation moved its deadline from July 11 to July 17, giving Pistorius time to compete in four European races as he tries to meet the 400-meter qualifying time of 45.55 seconds.

Tennis, anyone? Former gold medalists Venus and Serena Williams are expected to play both singles and doubles for the team announced by the U.S. Tennis Association.

The nine-member team includes Lindsay Davenport, who won a gold medal in singles at the 1996 Games.

James Blake, Sam Querrey and Robby Ginepri were named to the men's team in singles. Bob and Mike Bryan, the No. 1 doubles team, and Blake and Querrey have been nominated as doubles teams.

The last place on the women's team is expected to go to Jill Craybas, who would be a first-time Olympian at age 34.