KO artists train for a few rounds only?

[Alexandoy]

I have heard one fight moderator say that some knockout artists don’t train for the full route of the fight. In mixed martial arts, the championship fight is composed of 5 rounds and usually heavy hitters train for only 3 rounds. That’s why when the fight enter the so called championship rounds (round 4 and round 5), the heavy hitter would obviously be fatigued already since his training was good for 3 rounds only in anticipation of an early knockout. In the second fight of Conor McGregor and Nick Diaz, the anticipated knockout did not come. In the 4[SUP]th[/SUP] round, Diaz’s face was a mess but he was still standing and fighting decently. McGregor’s strength had faded so the fight went the full 5 rounds and McGregor could only muster a split decision win. But if he had trained properly and did not lose steam then Diaz would have suffered a knockout.