Amir Khan considered pulling out of his grudge match with Kell Brook just three weeks into his gruelling training camp.
'King Khan' will finally settle his rivalry with Brook in Manchester this weekend after several years of failed negotiations and near-misses.
The British star went to train with new coach Brian 'BoMac' McIntyre in the cold climate of Colorado alongside previous foe Terence Crawford.
But Khan wasn't convinced his body could cope with a full camp after more than two years out of the ring.
"Speaking to Kell Brook and Amir Khan in the build-up to this fight, both guys are so convinced they're going to win, they've wanted it for so long and have now finally got the opportunity," former European champion Spencer Oliver told Sky Sports News.
"I just think they've pushed themselves to a place they've never been for a long, long time. Amir Khan the other day was telling me that he felt really good, after two or three weeks he was thinking about packing it in.
"After two or three weeks of going into his training camp, he didn't know if he could put his body through it anymore.
"He was finding it really hard, he said 'I didn't know if I could go through it' and then when he hit the six to seven-week mark, he said he's enjoying it more than ever before.
"He said he's fallen in love with the sport again, mentally and physically, he's in the best shape of his life. There is no world title on the line but this is all about bragging rights, this is all about the fight that they're going to be remembered for."
Khan claimed during his training camp that he had picked up a few small injuries that initially had plagued his preparations.
However he later dismissed them and reiterated the claim that he was in the best shape of his life ahead of his domestic duel.
Who will win - Amir Khan or Kell Brook? Let us know your prediction in the comments section below
Brook had previously relayed his fears that Khan could pull out of the fight due to coronavirus issues or injuries.
This was also reinforced by his coach Dominic Ingle who emphasised the amount of work that had been put in to make Brook ready to make the clash.
Fans were also concerned with Khan's "skinny" frame as he worked out with his rival in Manchester yesterday.
But Khan has since put any concerns to bed, and has praised the impact of Crawford who advised him ahead of the bout.
"I've never trained so hard. I never had an easy day," he said. "Having Terence Crawford here is massive motivation.
"He is the best fighter in the world - he fought me and Kell - and his advice has been brilliant.
"I will win this fight in good style. Kell doesn't have a chance - it is the best Amir that is coming on Saturday."
