Boxing: 'He was the dominant heavyweight' - Joseph Parker on his first loss to Junior Fa

Joseph Parker says his loss to Junior Fa during their amateur days caused a big shift in him, ultimately leading to becoming the number one ranked boxer in New Zealand.

In a video released by boxing promoters Duco, Parker showed the public inside his training camp in preparation for his heavyweight clash against Fa.

Parker said his first defeat at the hands of Fa – the duo has fought each other four times in their amateur careers, with each boxer winning twice – came as a shock after a string of wins, one that made him change his approach to the sport.

"He was the dominant heavyweight on the scene before I came through," Parker said. "In that first fight I did lose against him.

"It was a different experience because I was coming through and I was winning, winning, winning, then I came across Junior Fa and I lost my first fight against him. And that was a different feeling.