Fitness gremlins at the WTA event in Seoul brought an end on Saturday to the winning run of Emma Raducanu, with the Brit beaten 4-6, 6-4 3-0 by fellow former Grand Slam winner Jelena Ostapenko to exit in the semi-finals.

The 2021 US Open champion who claimed that Grand Slam title from a qualifying start, was facing off in her first Tour semi since her big run at Flushing Meadows more than a year ago.

The 19-year-old’s injury was classified as a glute muscle concern with no further detail available

It marked the fourth time this season that the fragile Londoner, now ranked 77th after cracking the Top 10 this season, has had to quit a match.

Her other letdowns came at Guadalajara, Rome and Nottingham.

Raducanu was on a roll in South Korea , winning three straight matches for the first time since New York in 2021.