Complex sentence: The ultimate sprinter or the rider with the best condition is unlikely to win the omnium, the one that has the ability to combine and be competitive in both styles of disciplines is the rider who is most likely to win the event.
Split into simpler sentences: The ultimate sprinter or the rider with the best condition is unlikely to win the omnium. The one that has the ability to combine and be competitive in both styles of disciplines is the rider who is most likely to win the event.