By Miguel Rivera

Saul 'Canelo' Alvarez (46-1-1, 32KOs) says a catch-weight of 155-pounds was necessary to officially defend his title against Amir Khan (31-3, 19KOs) on May 7th from the T-Mobile Arena in Las Vegas.

Khan is moving up by eight pounds, from his current fighting weight of 147, to make the HBO Pay-Per-View fight happen.

The British boxer is a sizable underdog, mainly due to the difference in size and his past performances where he was knocked out by much smaller fighters at lightweight and junior welterweight.

In recent weeks, there has been some debate of which side demanded the catch-weight of 155.

According to Canelo, Khan demanded a weight where the middleweight title would be at stake and they settled on 155. Khan told BT Sport that Canelo's team requested a weight of 155, which he felt was fair and agreed.

To clear up any confusion, Canelo said:

"We wanted to defend the title and that is why it was negotiated for 155-pounds, so the middleweight title could be defended. We could not do it it 154, because then I can not defend that title. That is why we agreed to do it at that weight, one pound above, to make it a championship fight," Canelo said.

There is no rehydration clause and that allows Canelo to weigh in as high as he wants on the day of the fight. Khan told BoxingScene.com that Golden Boy Promotions, who promote Canelo, told his team that a rehydration clause would not be up for discussion, so Khan did not pursue that clause. In some interviews, Khan stated that he didn't really want a rehydration clause to avoid the possibility of Canelo's team claiming their fighter was drained in defeat.