After spending two weeks training with Naoya Inoue recently, Raza Hamza says he's come back "a brand new fighter".

Both boxers have fights coming up, with Inoue challenging Jamie McDonnell for the WBA World Bantamweight Title on May 25th in Japan. Next month, Hamza takes on Lewis Pettitt on the Billy Joe Saunders v Martin Murray undercard at The O2.

The unbeaten Featherweight prospect spoke to the BoxNation Podcast about sparring the 'Monster': "It was amazing. From the first day I was there it was great sparring. 15 days and I really enjoyed it.

"I learned the way he approached camp, how an elite World Champion goes into training. How dedicated, motivated and focused he was. He can punch very hard and he's a great fighter," added the 25-year-old.

Hamza also revealed that he still keeps in contact with Inoue, who has won World Titles in two weight divisions after just 15 fights.

"I was running with him. I was training with him daily. He still messages me near enough every day on Instagram. He spoke to me about what I should do. He was teaching me stuff on the days we weren't sparring. They're very nice people."

Training alongside one of the best boxers on the globe could prove to be valuable experience for the Birmingham boxer, and Hamza had a warning for his next opponent.

"I feel like I've come back a brand new fighter, I just can't wait to fight now! I can't wait to show everyone how much I've improved.

"To be honest, no disrespect to Lewis, but he isn't on the level I've been sparring," he explained. "These fights I should be winning, and I should be winning with comfort."

Also on episode 25 of the BoxNation Podcast, Josh Warrington talks about becoming Leeds' first World Champion, plus Darren Tetley and Mason Cartwright discuss their classic on the undercard.

You can also download the podcast on iTunes or listen on SoundCloud or Spotify.