World No.3 Jordan Spieth has pulled out of next month's Olympics because of fears concerning the Zika virus, officials say.
Spieth's withdrawal means the Olympic golf tournament will be without the world's top four golfers.
Australia's world No.1 Jason Day, Dustin Johnson and Rory McIlroy had all previously said they would not be competing in the event.
"It was out of concern at health issues we have been talking about (recently)," International Golf Federation vice-president Ty Votaw said at Royal Troon ahead of this week's British Open, referring to the reasons for Spieth's pull-out.
Bubba Watson, Rickie Fowler, Patrick Reed and Matt Kuchar were also announced as the four players in the US team for the Olympics in Rio de Janeiro.Golf is returning to the Games in August following an absence of 112 years.
Zika is a mosquito-borne virus that the World Health Organisation says is spreading rapidly in the Americas.
Reuters
