Joseph Parker (24-0, 18 KOs) is "on track" for his heavyweight unification fight with Anthony Joshua (20-0, 20 KOs) in Cardiff next month.
Parker will put his WBO strap on the line at the Principality Stadium, while Joshua's IBF, IBO and WBA belts will also be draped around the victor on March 31.
The pair will finally come together after months of negotiations between the representatives of both camps, the bout confirmed early in 2018.
Ahead of the fight Joshua said he hoped Parker would be fit enough to go the distance in their 12-round contest, and Parker has provided an update that should please the British boxer.
"Training has gone really good," he told Sky Sports News at his Las Vegas training camp.
"Everything is on track. We've got a good structure and a good plan.
"Going into camp, everything is all good, everyone is happy. Just got to put in the work and prepare for March 31."
Parker's coach, Kevin Barry, indicates that his boxer has been doing a lot of road work to get his stamina in order.
"Joe loves his road work," said Barry. "This is something that we've always done the five years we have been together. Most mornings he's up at 5 o'clock, preparing himself in his room. He has a little bit of fruit and 5.30 he's on the road.
"This morning he will probably do the short run, about three and a half. He usually runs five miles in the morning. Today he will change that up. It will be a bit of forward running, backward running, sideways. He will be changing that up this morning. This fight has been inevitable and it's just great that it's come together on such a huge stage, and a fight that means so much.
"First unification fight for nearly eight years. I know that Joshua will be taking it very seriously as he always does. Joseph Parker is preparing the best he possibly can for this fight."