Emma Raducanu advances amid coaching split but Katie Boulter comprehensively beaten.

Emma Raducanu advances amid coaching split but Katie Boulter comprehensively beaten.

Emma Raducanu strolled into the second round of the Miami Open on Wednesday, but compatriot Katie Boulter was swiftly beaten by home favourite Peyton Stearns.

Atoning for her early exit at the Indian Wells Masters a couple of weeks ago, Raducanu eased to a 6-2 6-1 victory over Japanese wild card Sayaka Ishii, her first win since beating Maria Sakkari in Dubai over a month ago.

However, British number one Boulter could not follow in Raducanu’s footsteps, going down 4-6 2-6 to a fired-up Stearns in what was just her fifth match of a disrupted 2025.

After a comprehensive defeat at the hands of Moyuka Uchijima in California, Raducanu took just 65 minutes to dispatch world number 188 Ishii, serving six aces and converting five of her six break points.

Ishii did make a brief statement with a break back to love in the third game of the match before holding for 2-2, but a relentless Raducanu subsequently won nine games on the spin and required just one match point to seal the deal.

The 2021 US Open champion now faces a daunting second-round showdown against eighth seed Emma Navarro, whom she will face without coach Vlado Platenik, having split with the 49-year-old following a short-lived two-week trial period.