Britain’s No 1 and 2 ranked women brushed aside the challenge of China’s Xinyu Jiang and Taiwan’s Fang-Hsien Wu to win 6-4 6-2 in the opening round of the HSBC Championships.
Boulter and Raducanu will both also feature in the singles competition, with the iconic London grass court venue hosting a women’s tournament for the first time since 1973.
The pair could face fellow Brits Sonay Kartal and Jodie Burrage in the next round, with the other home pairing set to face top seeds Lyudmyla Kichenok and Erin Routliffe on Tuesday.
“I was actually very nervous before the match,” said 2021 US Open champion Raducanu. “I don’t know if you could tell, but, yeah, probably more nervous than the singles, because I just didn’t necessarily know what to do.
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“I’m really happy once we got out there, Katie made me feel so comfortable, and I’m just so pleased to get a win.”
This Queen’s partnership, Raducanu revealed, came “spontaneously”, after a few close calls where she and Boulter nearly joined forces at Madrid, Paris and Miami.
Asked it could extend as far as Wimbledon, Raducanu replied: “We haven’t spoken about it. It worked pretty well, so we’re just going to keep on trying to do as best we can this week.”
Boulter joked: “Scrap what she said – we’re going for the Wimbledon title! No, I’m just kidding.”
Boulter will begin her singles campaign against Australian Ajla Tomljanovic, while Raducanu faces Spain’s Cristina Bucsa.
Elsewhere on Monday, Britain’s Jacob Fearnley was beaten in straight sets by American Brandon Nakashima in the first round of the Boss Open in Stuttgart