Saul 'Canelo' Alvarez has revealed he had to leave training camp to see the birth of his daughter before returning to prepare for Saturday's blockbuster showdown with Terence Crawford in Las Vegas.
Canelo's daughter, Eva Victoria, was born around four weeks ago and is his fourth child.
The Mexican superstar, already one of the most decorated fighters in boxing history, admitted it was 'incredibly hard' to walk away from his newborn and partner in order to continue his gruelling preparations.
But he insists the sacrifice has given him fresh motivation to deliver under the lights in Nevada on Saturday evening.
'I left training to be at the birth of my daughter,' Alvarez exclusively told Daily Mail Sport. 'I received my daughter and everything was amazing.
'It was so beautiful. But then I had to go back to my training camp. It was incredibly hard to be away from them.
Saul 'Canelo' Alvarez has revealed he had to leave training camp to see the birth of his daughter (above) before returning to prepare for Saturday's showdown with Terence Crawford
The two superstars will face in each other at the Allegiant stadium in Las Vegas
'Especially when she had just arrived but it made feel motivated. I do everything for them. I will win this fight for them.'
For a man who has won world titles in four weight classes, headlined sold-out nights from Madison Square Garden to Las Vegas, and fought some of the biggest names of his generation, the emotion in his voice is striking.
Beneath the belts, fortune and fame, Alvarez insists his true drive comes from home.
'When I need to go to a training camp, they understand. It's my job and we all get into that mindset when a fight comes around. Once I finish this fight, I will spend time with them,' he said.
The 34-year-old has spent almost 20 years living in the spotlight. He turned professional as a teenager in Guadalajara and has since become one of the sport's biggest global stars, with a following that stretches far beyond Mexico.
Yet he admits there are times he dreams of a simpler life, free from the glare. 'Sometimes I do,' he confessed. 'Life would be a lot easier. A lot more simple. But I appreciate everybody who recognises my accomplishments.
'People who understand what I do and have done in boxing. It's amazing to feel like love from them. From people I don't know. When I started boxing, I wanted this right? I can't go back on that now.
'I have to handle everything the fame throws at me and I have to accept everything that comes with the fame. It's part of my life now.'
Away from the pressure cooker of fight week, Alvarez is known to relax with golf, with a Sunday round traditionally part of his post-fight ritual. But not this time.
'I don't know if I'm going to golf on Sunday, because I want to be with my daughter. I usually always play on the Sunday after my fight but I miss her, so I will probably spend the full day, 24 hours with her. I really want to spend time with her and my family, I have plenty more years of being able to play golf.'
While Alvarez juggles the demands of fatherhood with the fight of his life, Crawford arrives in Las Vegas unbeaten, with a reputation as one of the finest technicians of his era.
Between them they have unified titles across several weight divisions and carry the billing of a true pound-for-pound clash – the kind of showdown Las Vegas has long thrived on.
But for Canelo, amid the millions watching and the legacy debate that will rage once the final bell rings, the motivation has already been decided.
His gaze, he says, is fixed firmly on the people waiting at home. 'I do everything for them. I will win this fight for them.'