The Associated Press
MELBOURNE, Australia (AP) -- Serena Williams' dominating run at the majors ended in a painful loss to American teenager Sloane Stephens.
After the biggest victory of her life, the 19-year-old Stephens is headed to the semifinals of the Australian Open.
Williams hurt her back in the eighth game of the second set, slowing down her serve, restricting her movement and causing her obvious pain.
Stephens kept her composure, blocking out the injury issue on the other side of the net, and rallied for a 3-6, 7-5, 6-4 victory on Wednesday.
It was Williams' first loss since Aug. 17, and her first defeat at a Grand Slam tournament since last year's French Open.
The 15-time major winner hadn't lost a match at a Grand Slam tournament since the French Open, where her first-round exit sparked her resurgence in the second half of 2012 that included titles at Wimbledon, the London Olympics, the U.S. Open and the WTA Championship.
Stephens next plays defending champion Victoria Azarenka.
In the men's draw, U.S. Open champion Andy Murray moved into the semifinals with a 6-4, 6-1, 6-2 win over unseeded Jeremy Chardy of France.
ALAMEDA, Calif. (AP) -- Former Oakland coach Bill Callahan denied allegations made by two of his former players that he "sabotaged" the Raiders in their Super Bowl loss to Tampa Bay 10 years ago.
Former Raiders receivers Tim Brown and Jerry Rice both said in recent interviews they believe Callahan undermined his own team in the Super Bowl in 2003 because of his close friendship with Tampa Bay coach Jon Gruden by altering the game plan less than two days before Oakland's 48-21 loss.
"... I am shocked, saddened and outraged by Tim Brown's allegations and Jerry Rice's support of those allegations made through various media outlets over the last 24 hours," Callahan said Tuesday in a statement. "To leave no doubt, I categorically and unequivocally deny the sum and substance of their allegations."
NEW YORK (AP) -- Sean Payton is back as coach of the New Orleans Saints.
Payton's season-long suspension for his role in the Saints' bounty program was lifted by NFL Commissioner Roger Goodell nearly two weeks earlier than expected.
The decision allows Payton to attend the Senior Bowl in Mobile, Ala., on Saturday, where some of the top college players available for the NFL draft will be competing.
NEW YORK (AP) -- The NFL is looking into Tom Brady's leg-up slide that hit Ravens safety Ed Reed in the AFC championship game.
League spokesman Greg Aiello said "any play of that nature is routinely reviewed."
Brady could be subject to a fine if the league believes he violated any player safety rules.
Reed says Brady attempted to apologize this week for the slide.
"He actually reached out to me, texted me," Reed told WJZ-FM in Baltimore.
NEW YORK (AP) -- Jets coach Rex Ryan was uninjured in a three-car accident in eastern Pennsylvania last week.
A team spokesman confirmed that Ryan was issued a warning and no citation after the accident on Jan. 14 in Bethlehem, Pa..
No one in the other two cars was injured in the accident, which was first reported by Deadspin.com.
SAN DIEGO (AP) -- Hall of Famer Charlie Joiner retired from his job as wide receivers coach for the San Diego Chargers, ending his 44 years in the NFL as a player and coach.
GRAPEVINE, Texas (AP) -- Dallas Cowboys defensive lineman Jay Ratliff is free on bond after his arrest on suspicion of driving while intoxicated.
The 31-year-old nose tackle was arrested shortly after midnight after his pickup truck sideswiped a tractor-trailer on Texas 114 about 20 miles northwest of Dallas.
MOBILE, Ala. (AP) -- Dallas Cowboys owner Jerry Jones said that coach Jason Garrett may give up play-calling duties on offense.
Speaking to reporters at Senior Bowl practices, Jones said offensive line coach Bill Callahan could inherit play-calling duties, but stopped short of saying a decision had been made.
ATLANTA (AP) -- A 46-year-old man was arrested in a stabbing near the Georgia Dome following the Falcons' NFC Championship game loss.
Georgia Dome spokesman Jason Kirksey says James Lewis McCoy of Villa Rica was arrested by the Georgia World Congress Center Authority Police Department. Information on McCoy's charges was not immediately available.
BALTIMORE (AP) -- Fans watching NFL games on television have grown accustomed to the imaginary yellow line that runs across the field in accord with the first-down marker.
That first-down line could one day become part of the in-game experience at all 32 NFL stadiums.