Mexico's Orlando Salido is still the only fighter to stain the professional record of Vasiliy Lomachenko.
In 2014, Lomachenko attempted to make history by winning a world title in only his second professional fight.
But that didn't happen, as the much bigger Salido made it a very rough fight and used veteran tactics to win a twelve round split decision to shock Lomachenko.
Salido explains that he stayed very close to Lomachneko and refused to allow the two-time Olympic gold medal winner to have enough time to formulate a plan during the action.
“When I fought him, I got on top of him, trying not to give him distance and not let him think,” Salido told ESPN. “If you let him think, he starts with his side steps, his movements, his left-handed guard, and that makes him very dangerous.
“We knew we had to make him uncomfortable, not let him think, and be on top of him to make him a good fight – and that’s what happened that night.
“I planned to be there, always by his side, throwing punches, not letting him think, not letting him act, because we knew he was a fighter with many weapons.”
A rematch never took place, as the two boxers were never able to agree on the financial terms to make it happen.
Lomachenko has since become a three division world champion.
On Saturday night at the MGM Grand's Conference Center in Las Vegas, Lomachenko will collide with undefeated puncher Teofimo Lopez - with the IBF, WBC Franchise, WBA, WBO lightweight titles at stake.
The much younger Lopez is viewed as the most dangerous opponent in the career of Lomachenko.