A new day in international golf dawned with bright sunshine as the sport returned to the Olympics for the first time since 1904.
Given the honour of ending the 112-year absence, Brazil's Adilson da Silva hit his first drive down the right side of the fairway at the Olympic Golf Course shortly after 8.30am Rio time.
Sixty golfers will play 72 holes of stroke play on the 7,128 yard, par-71 layout on a former sand quarry along saltwater marshes and lagoons.
Henrik Stenson of Sweden leads the way among an international field that includes the likes of world number 11 Sergio Garcia (Spain) and Martin Kaymer (Germany).
Bubba Watson, Rickie Fowler, Patrick Reed and Matt Kuchar are the medal contenders for the United States.
Masters champion Danny Willett and Justin Rose represent England, while Emiliano Grillo (Argentina), Rafa Cabrera-Bello (Spain) and Nicolas Colsaerts (Belgium) are among the other contenders.
Jason Day, Jordan Spieth, Rory McIlroy, Branden Grace, Dustin Johnson and Adam Scott are notable absentees after expressing concerns over the Zika virus.