Boulter will now face a tricky job towards Wimbledon and US Open runner-up Amanda Anisimova.
She has had a combined 12 months however, after tweaking her serve, registered a formidable victory over Japan’s Moyuka Uchijima to assist Nice Britain attain the Billie Jean King Cup semi-finals.
She misplaced her subsequent singles match 3-6 6-4 6-2 to world quantity seven Jessica Pegula as Britain had been crushed 2-0 by the US.
Elsewhere, Novak Djokovic confirmed he’ll play in October’s Shanghai Masters – his first look since his US Open semi-final defeat.
The Serb has repeatedly stated he’ll slim down his calendar to guard his physique within the last years of his profession.
The 38-year-old reached the ultimate in Shanghai final 12 months however misplaced to Jannik Sinner, who was then the world primary.
Sinner and present world primary Carlos Alcaraz each return to ATP Tour motion in Beijing and Tokyo respectively this week.