(Reuters) - World number two Jordan Spieth has played down fears that the Zika virus could affect his participation at the 2016 Rio Games, adding that he is looking forward to the "tremendous honour" of representing his country in Brazil. The 22-year-old, who will defend his U.S. Open title at Oakmont this week, had not categorically committed to the event over fears of the mosquito-borne virus, which has been linked to birth defects and developmental problems in babies. With golf returning to the Olympics after a 112-year absence, Spieth said he was satisfied by the information given by the PGA Tour. More...