Japan's Hideki Matsuyama has become the latest golfer to opt out of the Rio Games due to fears over the Zika virus in another setback to the sport as it makes its return to the Olympics for the first time since 1904. World number one Jason Day of Australia pulled out last Tuesday, a week after world number four Rory McIlroy of Northern Ireland announced he would not compete at the Olympics. Twice major winner Jordan Spieth is still undecided about whether to participate amid ongoing concerns about Zika, a mosquito-borne virus that the World Health Organization says is spreading rapidly in the Americas. More...