Under the guidance of Nick Cavaday, Raducanu has developed a more compact motion, almost an abbreviation of the technique utilised to great effect by world-beating server Andy Roddick.
“I have been working on it,” Raducanu admitted following her win at the Palacio de Deportes.
“Training for next year, I do want to work on my serve and make that a bit more of a weapon.”
However, Raducanu acknowledged her serve was not the finished article. “It does come with a bit of a trade-off, I think especially in the early stages when I’m figuring it out still,” she said.
“I have to take the double faults with the aces.”
Canada have not yet confirmed their team, which will be done an hour before the match is expected to start at 4pm GMT on Sunday, but Raducanu is likely to face either Rebecca Marino or Marina Stakusic, who are ranked No 103 and 127 in the world respectively.
As the two highest ranked singles players, Boulter is expected to face Canada’s Leylah Fernandez, who Raducanu beat to claim the US Open title in 2021.
Boulter said she was “very excited” about the prospect of the match-up, adding: “[She’s a] great player. Someone that I have a huge amount of respect for.
“She’s the first person on the courts in the morning when you come to the site and the last person there, and she works extremely hard.
“I do have a lot of respect for her. We all know what she’s capable of. It will be an absolute battle, but I’m looking forward to it.”
Canada have not yet played at the Billie Jean King Cup finals, having received a bye through to the quarter-finals as a result of having won the competition in 2023, but Great Britain are not underestimating the challenge.
Team captain Anne Keothavong said: “What they achieved last year was remarkable, it really was.
“We’re not underestimating them by any means. They can be incredibly touch. They have a fantastic team spirit but so do we. They are hungry to defend their title, but we are hungry to win.”
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