Swimming

Olympic medalist Ledecky says she’s turning pro

• Katie Ledecky is turning pro.

The five-time Olympic gold medalist announced on Twitter that she is giving up her final two years of eligibility at Stanford. She’ll keep training at the West Coast school while working toward her degree.

The 21-year-old Ledecky helped Stanford capture two women’s national championships, the first back-to-back titles since winning five straight from 1992-96.

Ledecky wrote on Twitter that she’s excited to turn pro. She thanked the Cardinal program for “two amazing seasons” and saluted her family, friends and fans.

The decision to turn pro allows Ledecky to cash in on sponsorship and endorsement deals ahead of next year’s world championships in South Korea and the 2020 Olympics in Tokyo.

Ledecky was among the biggest stars at the 2016 Rio Olympics, winning four golds and a relay silver.

Sailing

British-born sailor

presumed lost at sea

•  A sailor is presumed lost at sea after going overboard in the harsh, remote Southern Ocean some 1,400 miles west of Cape Horn.

John Fisher is a British-born sailor who lived in Adelaide, Australia. He went overboard from Team Sun Hung Kai/Scallywag’s 65-foot sloop in rough conditions.

Volvo Ocean Race officials say the team searched for several hours in high wind and big waves before deteriorating conditions forced it to resume course toward South America.

The race president said Tuesday “we must now presume” that Fisher has been “lost at sea.” The statement by Richard Brisius came nearly 24 hours after Fisher was tossed in the ocean. Brisius cited the cold water, “extreme sea state” and length of time since Fisher went overboard.

tennis

John Isner upsets Cilic in

Miami Open quarterfinals

• American John Isner upset second-seeded Marin Cilic of Croatia 7-6 (0), 6-3 to reach the Miami Open quarterfinals.

The departure of Cilic, the 2014 U.S. Open champion, leaves fourth-seeded Alexander Zverev of Germany as the highest seed remaining in the draw.

“I was in a very good serving rhythm today,” Isner said. “I felt that really from my opening serve, the whole match that I knew it was going to be a good serving day.

Top-seeded Roger Federer lost his opening match at the tournament, and third-seeded Grigor Dimitrov of Bulgaria lost in the third round.

The 14th-seeded Isner, who reached the Miami Open semifinals in 2015, never faced a break point and made 73 percent of his first serves.

In the quarterfinals, Isner will play 19th-seeded Hyeon Chung, a South Korean who defeated Joao Sousa of Portugal 6-4, 6-3.

— ABJ/Ohio.com wires