Charlotte Cornwallis, from the Moreton Morrell club near Warwick, made it a 'double double' in the royal and ancient game of Real Tennis.
After winning the world singles and doubles titles in Paris last week, the 29-yearold former junior hockey international added both the M&G Women's British Open singles and doubles crowns.
Cornwallis squeaked through a high-quality British Open singles final on her home court against her fellow-professional Jo Iddles, the second seed.
The aggressive Cornwallis struggled in the second set thanks to fine volleying and retrieving from Iddles, but she coolly produced the perfect-length return when set-point down at 4-5 in the second set. She then piled on the pressure to take the match 6-3, 6-5.
It was a repeat of her thrilling three-set victory over Iddles in the world championships in Paris the previous week.
In the British Open doubles final, Cornwallis and British amateur Sue Haswell, the new world doubles champions, then faced Iddles and Jill Newby who had survived a second-set fight-back by former world champion Sally Jones, of Moreton Morrell, and Alex Garside in a hardfought semi-final.
Although the favourites trailed 0-3 and 1-4 in the second set, they kept their nerve on the big points and Cornwallis's extra aggression and weight of shot finally proved decisive as they won 6-4, 6-4.
"I'm absolutely thrilled," said Cornwallis. "Jo and I had an excellent match and she's improved a lot so I really had to go for my shots and was lucky to get past her in straight sets. In the doubles, we struggled in the second set as Jill and Jo volleyed brilliantly but somehow we hung on.
"Playing on my home court was also a huge help. Moreton is very fast and true, which suits my game and it has an amazing historic atmosphere."
Cornwallis, who is set to replace former world champion Penny Lumley as world No 1, is now setting up an academy to help the current batch of rising female stars.