Tsitsipas, 21, wins ATP Finals

Stefanos Tsitsipas rallied to beat Dominic Thiem 6-7 (6), 6-2, 7-6 (4) in London to become the youngest ATP Finals champion in 18 years and collect the biggest title of his career.

The Greek, 21, is the youngest champion since Lleyton Hewitt in 2001.

On the PGA Tour, Brendon Todd and Vaughn Taylor were tied for the lead at 20 under par with four holes left in the rain-delayed Mayakoba Golf Classic in Playa del Carmen, Mexico, when play was suspended because of darkness . ... Tommy Fleetwood shot a sevenunder 65 and rallied to win the Nedbank Golf Challenge in a playoff in Sun City, South Africa. Fleetwood beat Marcus Kinhult (68) on the first extra hole for his fifth European Tour victory. They finished at 12-under 276.

Former Auburn and NBA player Marquis Daniels, who is director of player development for the Tigers basketball program, was injured in an automobile accident Saturday night in Auburn, Ala., and transported to a Birmingham hospital for treatment, an Auburn spokesman said. No further details were given.

Cristiano Ronaldo scored his 99th international goal as defending champion Portugal secured its place at next year’s European Championship with a 2-0 win at Luxembourg.

Anna Ponzio’s goal lifted Pomona-Pitzer to a 1-0 win over Wartburg in Waverly, Iowa, in the second round of the NCAA Division III women’s soccer tournament. The Sagehens will face the University of Chicago on Saturday in the third round in St. Louis . ... Lauryn Jeans made the winning penalty kick as Claremont-Mudd-Scripps beat Cal Lutheran after the teams had played to a scoreless draw in Thousand Oaks. The Athenas will face Washington University (Mo.) in St. Louis on Saturday . ... Ethan Tyng and Samay Rahim had secondhalf goals as Claremont-Mudd-Scripps beat host Trinity 2-0 in San Antonio to advance to the third round of the Division III men’s tournament. The Stags will face Centre College (Ky.) on Saturday in Gambier, Ohio.