U.S. Open champion Emma Raducanu is looking for a new coach just weeks after winning her first major. Jeremy Selwyn/Pool Photo via the Associated Press

TENNIS

Emma Raducanu has split from her coach, less than two weeks after winning the U.S. Open as a qualifier.

Andrew Richardson coached Raducanu for two years at youth level and linked up with her again in July on a short-term deal for the duration of her time in the United States ahead of and during the U.S. Open.

The 18-year-old Briton said she wants a more experienced coach now she will be playing in bigger events on the WTA Tour.

“I’m looking for someone who has been at that level and knows what it takes,” Raducanu said.

“And especially right now because I’m so new to it, I really need someone to guide me who’s already been through that.”

Richardson is a former Davis Cup player for Britain but has little experience of the WTA Tour.

OSTRAVA OPEN: Top-seeded Iga Swiatek of Poland advanced to the semifinals in Ostrava, Czech Republic, by beating seventh-seeded Elena Rybakina of Kazakhstan, 7-6 (5), 6-2.

Also, second-seeded Petra Kvitova of the Czech Republic knocked out Jil Teichmann of Switzerland, 6-4, 6-4.

COLLEGES

FIELD HOCKEY: Brooke Sulinski and Sydney Meader each scored twice to lead Maine (4-5, 1-0 America East) to a 5-3 win over Monmouth (5-4, 0-1 America East) in Orono.

Sulinski opened the scoring late in the first half, then made it 2-0 early in the third quarter. After Monmouth rallied to tie it, Chloe Walton restored Maine’s lead late in the third, and Meader added back-to-back goals in the fourth.

• Jessica Evans scored two goals and Lauren Curley had one Babson (6-1) cruised to a 3-1 win over Bates (3-3) at Babson Park, Massachusetts.

Bridget Thompson scored for Bates. Grace Biddle made six saves.

WOMEN’S HOCKEY: Alexa Hoskins and Courtney Vorster scored in the second period as Quinnipiac beat the University of Maine in a season opener for both teams in Hamden, Connecticut.

Quinnipiac took a 1-0 lead in the first on a goal by Nina Steigauf. The Black Bears tied it on a power-play goal by Celine Tedenby.

Maddie Giordano also scored for the Black Bears.

TRIATHLON

IRONMAN WORLD CHAMPIONSHIP: The Ironman World Championship will be held outside Hawaii for the first time in four decades because of uncertainty over whether the Big Island will be able to host the triathlon as scheduled in February during the coronavirus pandemic.

Competitors will head to St. George, Utah, on May 7 instead, West Hawaii Today reported. Organizers plan to bring the event back to the islands in October 2022.

BASKETBALL

NBA: The NBA has denied Andrew Wiggins’ request for a vaccination exemption, leaving the Golden State Warriors swingman ineligible to play home games until he meets San Francisco’s vaccination requirement.

The ruling was announced Friday, hours after the New York Knicks said their entire roster is vaccinated, making all their players eligible to play in their home games. Because of local coronavirus regulations in New York and San Francisco, the Knicks, Brooklyn Nets and Warriors are required to be vaccinated to play in their home arenas unless exemptions for medical or religious reasons apply.

Wiggins sought an exemption from the league for religious reasons.

Unvaccinated players are allowed to play this season, though the NBA has said that they will have to be tested daily on practice and travel days and at least once – possibly more – on game days, while fully vaccinated players will not be subject to daily testing.

• Chicago Bulls forward Patrick Williams has a severe left ankle sprain that could cause him to miss the start of the season.

The news is a blow for a team hoping to make the playoffs in the Eastern Conference after some major offseason moves.

The Bulls expect Williams to miss four to six weeks because of the injury sustained Sept. 15 during an optional individual workout. Chicago opens the season at Detroit on Oct. 20.

Williams started 71 games and averaged 9.2 points and 4.6 rebounds last year after being drafted out of Florida State with the No. 4 overall pick.

GOLF

LPGA: A Lim Kim, Katherine Kirk and Eun-HI Ji each shot 8-under 63 Friday for a one-shot lead over Sarah Burnham after the first round of the Walmart Northwest Arkansas Championship.

Five others – Nasa Hataoka, Lindsey Weaver, Pajaree Anannarukarn, Aditi Ashok and Klara Spilkova – were another stroke back after 6-under 65s at Pinnacle Country Club.

Kim, of South Korea, and Burnham posted career-low rounds, while Ji, the 2009 U.S. Women’s Open champ, matched her career best. Kim, the 2020 U.S. Women’s Open winner, didn’t make her first birdie until the seventh hole, and that kicked off a run of five straight from Nos. 7-11. She added another birdie at the 16th and punctuated her round with an eagle on the par-5 18th.

OLYMPICS

FIGURE SKATING: Vincent Zhou won the Nebelhorn Trophy men’s competition, which secured a third entry in the Beijing Olympics figure skating competition for the United States.

Nebelhorn Trophy is the final qualifying competition for the Olympics next February.

AUTO RACING

FORMULA ONE: Formula One leader Max Verstappen will start at the back of the grid at the Russian Grand Prix after the team confirmed he would use a new engine and accept the resulting penalty.

Verstappen had to go over his allocation of engines for the season because one was damaged when he crashed after making contact with Lewis Hamilton at the British Grand Prix in July.

Verstappen said he would have needed a new engine at some point before the end of the season.

INDYCAR: The love affair between Romain Grosjean and IndyCar will continue another year. The Frenchman will move to Andretti Autosport in 2022 to drive a full season, including the Indianapolis 500.

Grosjean did not commit to ovals when he left Formula One to drive for Dale Coyne Racing in IndyCar. He suffered serious burns in a season-ending F1 crash last November and didn’t want to put his family through the heartache of watching him race the most dangerous discipline in IndyCar.

Grosjean will drive the No. 28 sponsored by DHL and replace Ryan Hunter-Reay, the former IndyCar Series champion and Indianapolis 500 winner who was not retained after 12 seasons. The move had been expected since July but was confirmed Friday at the Grand Prix of Long Beach, the final event of the year.

SOCCER

WORLD CUP QUALIFYING: Brazil called up eight English Premier League players for World Cup qualifiers while hoping to avoid a repeat of farcical scenes which saw health officials come on the field to interrupt the team’s match against Argentina earlier this month.

FIFA is hoping the British government eases the quarantine requirements for players in time for this set of qualifiers in October. English clubs collectively agreed not to release players to countries on the government’s coronavirus “red list” for September’s internationals, which included Brazil.

Quarantine exemptions for Premier League players are being discussed in a bid to avoid a fresh dispute. There remains a possibility of an agreement being reached to avoid players having to quarantine for 10 days on their return.

SPAIN: The troubles for Barcelona Coach Ronald Koeman keep piling up.

Koeman received a two-match ban for complaining at the end of Barcelona’s 0-0 draw at Cádiz on Thursday. The result extended Barcelona’s winless streak to three matches and increased the pressure on Koeman.

Koeman was sent off deep into stoppage time for complaints directed at the fourth official. The Spanish soccer federation determined that this merited a tougher two-game suspension than the automatic one-game ban for a red card.

ENGLAND: Manchester United Manager Ole Gunnar Solskjaer claimed that referees have awarded fewer penalties to his team because of a complaint by Liverpool counterpart Jurgen Klopp at the start of the year.

Solskjaer is still aggrieved that United was denied two penalties in its 2-1 win over West Ham on Sunday. He also thought his team deserved a penalty against the same opponent in a League Cup match on Wednesday that West Ham won, 1-0.

GERMANY: Robert Lewandowski’s club-record scoring streak for Bayern Munich ended at 19 games when he failed to get a goal in his team’s 3-1 win at last-placed Greuther Furth.

Lewandowski, who hit the crossbar in the 40th minute, also missed out on equaling Gerd Muller’s record of scoring in 16 Bundesliga games in a row. Lewandowski’s 19-game run included matches in the league, German Cup and Champions League.