Learner Tien, a 19-year-old qualifier from Southern California, became the youngest American man to reach the Australian Open’s third round since Pete Sampras in 1990, upsetting a racket-tossing Daniil Medvedev 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (10-7) in a match that began Thursday night and ended in the wee hours of Friday.

The 4-hour, 49-minute contest had a bit of everything, including — hard to believe — a six-minute rain delay that interrupted play shortly before 2:30 a.m. with Tien serving at 5-all, 15-all in the fifth set. When they resumed, Medvedev broke and served for the victory at 6-5, but Tien wouldn’t cede a thing. He immediately broke back to force the concluding first-to-10 tiebreaker that he emerged to win shortly before 3 a.m., about two hours after he failed to convert his initial match point.

“Belief is a big thing in succeeding and winning, in general. I always go on the court believing that there’s a chance I can win,” said Tien, who showed up at his news conference toting a white cardboard box with a pepperoni pizza. “I wasn’t trying to think of the match as anything more important than any other match I’ve ever played. I was just going to go out there, have fun, see what I could do.”

As for the post-match snack, he said, “It was either going to be celebratory or a binge-y, like, cope. It feels better it’s more celebratory, for sure.”

The outcome was eyebrow-raising because of the wide gulf in experience and accomplishments between the two players at Margaret Court Arena. Tien is ranked 121st and owned a career Grand Slam record of 0-3 before this week; Medvedev was seeded No. 5, won the 2021 U.S. Open and was the runner-up at Melbourne Park in three of the past four years.

He turned 19 last month, and is the youngest man from the United States to get this far at the Australian Open since an 18-year-old Sampras reached the fourth round in 1990.

Meanwhile, five-time Grand Slam champ Iga Swiatek beat Rebecca Sramkova 6-0, 6-2.

Defending champ and No. 1 Jannik Sinner beat No. 173 Tristan Schoolkate 4-6, 6-4, 6-1, 6-3.

Women’s basketball

STANFORD 74, WAKE FOREST 71 >> Tess Heal scored a season-high 24, Nunu Agara added 23 and Stanford (10-7, 2-4) held on to beat Wake Forest (7-10, 0-6) in Winston-Salem.

Golf

PGA to move Genesis out of LA >> The PGA Tour is moving the Genesis Invitational out of Riviera next month out of respect for the deadly wildfires that have decimated parts of Los Angeles, including the Pacific Palisades neighborhood where Riviera is located.

Still unknown is where the $20 million signature event, with Tiger Woods as the tournament host, will relocate for Feb. 13-16.

One option is another golf course that already is part of the West Coast Swing — away from Los Angeles — which would limit the costs and work required to build a tournament site.

College football

Arizona State’s Dillingham gets 5-year extension >> Arizona State football coach Kenny Dillingham is getting a big raise following the Sun Devils’ Big 12 championship and an unexpected trip to the College Football Playoff.

The Arizona Board of Regents approved a contract extension for Dillingham through 2029 and a salary increase to $5.8 million. He made $4.1 million last season.

Dillingham took the No. 10 Sun Devils from three wins a year ago to the New Year’s Day Peach Bowl against No. 4 Texas, where its massive comeback came up just short.

MLB

Tucker, Cubs agree to $16.5M deal >> Kyle Tucker and the Chicago Cubs avoided arbiration, agreeing to a $16.5 million, one-year contract.

Tucker, eligible to become a free agent after this year’s World Series, was acquired by the Cubs from Houston last month for third baseman Isaac Paredes, right-hander Hayden Wesneski and Cam Smith, one of their top infield prospects.

Tucker, who turns 28 today, had a $12 million salary last year. He was limited to 78 games because of a fractured right shin, but he hit .289 with 23 homers and 49 RBIs for Houston.