In Kanopos Nome, travel to the Hippodrome and simply win the first tournament. I recommend the first tournament so it is more easier. The tournament is split into 3 races, I came 3rd in my first race but managed to win the other 2 and that was enough for me to win! Taking out other racers is a good way to make sure they don't get in front of you...
Doing this will also unlock the following trophy:
I created this video to help:
Hope this helps.