Marcus Fraser became the overnight leader on a historical day for the sport of golf, as Brazilian Adilson da Silva hit the first tee shot at the Olympics since 1904.
"My kids will be shocked to wake up and see their old man leading the Olympics"
Fraser was given an opportunity to represent his country following the withdrawal of Adam Scott and he wasted little time in making the most of his chance. The Australian made five birdies in the opening six holes, with a bogey on the second the only blotch on his scorecard. Fraser then took that form past the turn and holed four more birdies to finish on an eight under par 63. Thrilled by his performance the early front runner explained "my kids will be shocked to wake up and see their old man leading the Olympics".
Canada's Graham De Laet and Sweden's pre-tournament favourite Henrik Stenson find themselves three shots behind on five under par. The pair both made solid starts on the front nine with four birdies apiece, but slipped up with a bogey each after the turn, yet remain well and truly in gold medal contention.
Justin Rose creates history with a hole in one
The Team GB duo of Danny Willett and Justin Rose had mixed starts on their opening rounds. Willett found himself two under at the turn but dropped two shots on the back nine to finish even par. Yet there was a slice of history for Rose as he chipped the first hole in one of the modern Olympics on the fourth hole. The Englishman finds himself joint fourth on four under par alongside Belgium's Thomas Pieters, France's Gregory Bourdy, Germany's Alex Cejka and Spain's Rafa Cabrera Bello.
The Americans will be hoping for a change of fortune on day two as their quad of stars struggled to get to grips with new course. Rickie Fowler finds himself right near the bottom of the leaderboard on four over par, whilst Bubba Watson is only two shots ahead. Patrick Reed ended the day on one over par, but Matt Kuchar remains in contention after a round of 69 left him two under in tied eleventh place.
There are a number of big names who still cannot be forgotten about at this early stage. Belgium's Nicolas Colsaerts made three under par after a horrific opening tee shot and he is joined by Korea's Byeong Hun An. Germany's Martin Kaymer and Spain's Sergio Garcia are currently three strokes off a medal at two under par.