NEW YORK — The United States Tennis Association tightened enforcement of its no-smoking policy across the Billie Jean King National Tennis Center on Wednesday, responding to repeated player complaints about cannabis odour reaching the courts at the US Open. The measure targets grounds around Louis Armstrong Stadium.

Several professionals competing on the outer courts reported noticeable marijuana smell during matches this week. The complaints echoed similar grievances from the 2023 tournament, when the odour near Court 17 drew comment from multiple competitors and coaches.

Smoking, including cannabis, is prohibited inside the tennis center under USTA venue rules, though recreational marijuana is legal for adults in New York State. Tournament organisers said the smell often drifts from an adjacent public park and nearby sidewalks outside the grounds, complicating enforcement within the perimeter.

USTA officials said additional security staff would monitor entrances and seating areas, and that signage reminding spectators of the smoke-free policy had been increased. Fans found smoking on the premises could be removed from the event.

Cannabis regulation at major sporting venues has become a recurring flashpoint since legalisation spread across US states, with organisers balancing local law against the expectations of athletes and family-friendly crowds at flagship events.