Sports briefly: Sooners coach Lincoln Riley agrees to contract extension

Oklahoma and Lincoln Riley agreed to a contract extension, which should quell speculation about the second-year coach being lured away by an NFL team.

Oklahoma announced that contract terms were being finalized and would be subject to approval by the board of regents late this month.

... A prosecutor says LSU football players Hillar Moore and Clyde Edwards-Helaire appear to have responded with justifiable force when they fatally shot an 18-year-old man who was allegedly trying to rob them at gunpoint.

... Stanford tight end Kaden Smith and North Carolina State wide receiver Jakobi Meyers will skip their final seasons of college to enter the NFL draft. Smith had 47 catches for 635 yards and two touchdowns this season for the Cardinal. He missed the final three games because of a foot injury. Meyers set a single-season school receptions record with 92 catches for 1,047 yards this year.

... Miami linebacker Shaquille Quarterman will return for his final season of eligibility.

After nine years in the WNBA, Washington Mystics star Kristi Toliver is setting up her next career. She became the first active WNBA player to serve as an NBA assistant, taking a job with the Washington Wizards.

But, according to the New York Times, Toliver is making just $10,000 with the Wizards— well below what NBA assistants normally make, which can range from $100,000 to more than $1 million, depending on the experience of the coach.

That truly is experience that comes as a cost.

Petra Vlhova of Slovakia beat overall World Cup leader Mikaela Shiffrin in both runs of the final to win a parallel slalom city event in Oslo,Norway.

Valhova's victory was the sixth of her career.

In the men's race, Austria's Marco Schwarz claimed the first World Cup victory of his career when British opponent Dave Ryding missed a gate.

Ryding was attempting to become the first British skier — man or woman — in the history of the 51-year-old World Cup to win a race.

Roger Federer won the bragging rights over fellow tennis great Serena Williams as they faced each other on court for the first time, with Federer spearheading Switzerland's 4-2, 4-3 (3) victory over the United States in a mixed doubles decider at the Hopman Cup in Perth, Australia.

Federer and playing partner Belinda Bencic overcame Williams and Frances Tiafoe in the Fast4 format as Switzerland beat the U.S. 2-1 in front of a 14,000 capacity crowd.

Earlier, Federer beat Tiafoe 6-4, 6-1 in singles before Williams' 4-6, 6-4, 6-3 victory over Bencic.

"I was nervous returning [Williams' serve]. People talk about her serve so much and I see why it is such a wonderful serve because you just can't read it," Federer said. "It was great fun. You see how determined and focused she is, and I love that about her."

"It was so fun,'' Williams said. ''This is super cool that we get to do it at such a pinnacle point of our careers. I was so excited, and literally it was the match of my career. Just playing someone so great, and someone you admire so much, and a match that actually means something."