BBC Sport · Sep 1, 2025
'It has to stop' - US Open star distracted by courtside 'bettor'
Image caption, Leandro Riedi, ranked 435th in the world, has reached the US Open fourth roundIn the small confines of the US Open outside courts, it is virtually impossible for players not to hear exactly what fans are saying, even when they are focusing on a potentially career-defining match.
Shouts from courtside are almost universally supportive - but some players are starting to believe all is not what it seems.
In a peculiar New York incident, Switzerland's Leandro Riedi reported a vocal fan to the chair umpire - for cheering him on.
Exasperated by losing a break, 23-year-old Riedi suspected the man was a bettor and decided to act.