Emma Raducanu secured a dominant victory at the Transylvania Open on Monday, defeating Belgium's Greet Minnen 6-0, 6-4 in her first competitive match since parting ways with coach Francis Roig.

The 23-year-old UK star showcased confidence in Cluj-Napoca, Romania, dispatching her opponent in convincing fashion. Raducanu took the opening set in just 25 minutes, winning 90% of her first-serve points as she raced to a 6-0 bagel.

Raducanu hired Rafael Nadal's former coach last summer but announced plans to reassess her approach following last month's second-round Australian Open exit. The partnership lasted approximately six months, resulting in yet another coaching change since her breakthrough 2021 US Open title.

Working with former British professional Alexis Canter in Romania, Raducanu appeared relaxed and focused. She broke Minnen's serve in the third game of the second set and maintained control despite the Belgian's strong challenge.

"Very happy today. I think I played a great match from the beginning," the world No. 30 said after the match. "I was super aggressive and the crowd from the minute I walked out was incredible."

The victory marks a positive restart for Raducanu, after struggling with injuries and inconsistent form in recent years.

How to watch British tennis star Emma Raducanu this week

As the WTA 250 tournament's top seed, Raducanu next faces Slovenia's Kaja Juvan on Wednesday, live on The Tennis Channel.

Following the event, she plans to compete at WTA 1000 tournaments in Doha and Dubai before heading to Indian Wells in March.

The 2025 US Open is putting the WTA's best to the test, with some top-ranked players battling in three-set epics in the annual Grand Slam's first round.

World No. 6 Madison Keys suffered the first major upset of the tournament on Monday, committing 89 unforced errors across three hours and 10 minutes of play to fall to Mexico's No. 82 Renata Zarazúa 6-7 (10), 7-6 (3), 7-5.

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No. 3 Coco Gauff also found herself locked in a three-set battle, narrowly defeating Australia's No. 79 Ajla Tomljanović 6-4, 6-7 (2), 7-5 in her own three-hour endurance trial on Tuesday.

"This is the match that I needed," Gauff said afterwards. "I don't think it can get any more stressful than this."

Meanwhile, other top talents have seen smoother rides, with No. 1 Aryna Sabalenka, No. 2 Iga Świątek, and No. 4 Jessica Pegula all dispatching their opponents with relative ease.

Fan favorite No. 24 Naomi Osaka also cruised through her first-round matchup against No. 106 Greet Minnen, downing the Belgian in straight sets on Tuesday to meet US star No. 47 Hailey Baptiste on Thursday's second-round court.

A dramatic finish in Wednesday's second-round play also dominated headlines, as popular US contender No. 139 Taylor Townsend — the current world No. 1 doubles player — served Latvia's No. 26 Jeļena Ostapenko a 7-5, 6-1 upset loss in singles play, with the pair's heated post-match exchange causing a stir.

"[Ostapenko] told me I have no class and no education and to see what happens when we get outside the US," Townsend relayed in her on-court interview.

How to watch the 2025 US Open

The US Open's second-round play concludes on Thursday before the third round kicks off on Friday.

Live coverage of the New York Grand Slam airs across ESPN platforms.