Usain Bolt celebrates third 100m gold win. CREDIT: Getty Images

TRACK superstar Usain Bolt completed the first leg of his Olympic “threepeat” as he won the 100m gold medal yesterday.

The Jamaican beat his American archrival Justin Gatlin into silver with a time of 9.81 to 9.89 and Canada’s André de Grasse claimed bronze in 9.91 seconds.

South Africa’s Akani Simbine came in fifth in Monday morning’s Rio showpiece.

Bolt stormed to victory in the 100 metres final to become the first man to win three successive Olympic titles on the track.

The 29-year-old trailed Gatlin, roundly booed by the Rio crowd for his doping past, until the 70 metre mark but then swept past, finding time to pat his chest as he crossed the line a metre clear.

Victory took Bolt a step closer to his goal of winning a historic “triple-triple” combination of gold in the 100m, 200m and the 4x100m relay in three consecutive Olympics.

The charismatic star said: “Stay tuned, two more to go. Somebody said I can become immortal.

“Two more medals to go and I can sign off. Immortal.

“It wasn’t perfect today but I got it done and I’m pretty proud of what I’ve achieved - nobody else has done it or even attempted it.”