By Pedro Fonseca RIO DE JANEIRO, July 22 (Reuters) - Golf's return to the Olympic Games next month for the first time in 112 years has been marred by the absence of the sport's leading players and a court battle over potential environmental damage resulting from a new course in Brazil. Players, including the world's top four, are turning up their noses at the Olympics, citing concerns over the mosquito-borne Zika virus even though scientists have said there is little risk visitors will be infected during the Games, which start on Aug. 5. The golfers' lack of enthusiasm comes after the host city of Rio de Janeiro built a 18-hole course on 58,000 square metres of natural park in the Barra de Tijuca neighbourhood. More...