Over to the track now, where 100m world champion, Justin Gatlin is in South Africa for the first time in his career. The former Olympic champion is competing at the Grand Prix series in the South African capital of Pretoria. CGTN's Sias du Plessis looks at how the American continues to shine even as he approaches his late 30s.

Justin Gatlin's controversial career has been filled with extreme highs and devastating lows, but the 36-year-old has somehow managed to bounce back on every occasion and despite all the obstacles, the American has finally made his way to the summit of the 100 meters.

JUSTIN GATLIN 100m WORLD CHAMPION "That kind of stuff does affect me as a human being but as an athlete I have to stay focused and in the zone that I need to do, that's why I am here just to compete, go forward and I think that is a lesson that can be learned by the younger generation, always believe in yourself we will always go through adversity but stay true to who you are."

The world's fastest man believes his rivalry with the legendary Usain Bolt has made him into a better sprinter and has forced him to work harder each year.

JUSTIN GATLIN 100m WORLD CHAMPION "I mean when you race against Usain, you go into the situation thinking like you are the man, but then you get beat by another man, so how can I beat this guy? And he is winning everything, so along the way, I just had to be able to stay confident in who I am through my wins, through my losses, throughout my career with him even down to the last race, I had to give all I could go to that finish line."

Gatlin says that the competition on the track is becoming tougher with each event as each year sees the emergence of so many talented sprinters from across the globe including South Africa.

JUSTIN GATLIN 100m WORLD CHAMPION "Speaking on US Track and Field we see the rise of South African athletes like we have seen the rise of the Chinese athletes, so it is something that you can't sit back and like oh okay Jamaicans are here, we're here that's all we got to worry about, because that's not the case anymore, the case is that everyone is getting better."

SIAS DU PLESSIS PRETORIA, SOUTH AFRICA "This very track is where the world 100m champion will make his first competitive appearance on South African soil and even though he is running 50 metres more and it is the earliest he has run before the season, he is still expected to set the crowd alight on what promises to be an unforgettable night for athletics fans who are expected in their droves to see the world's fastest man in action, Sias du Plessis, CGTN, Pretoria."