Chris Eubank Jr predicted that Anthony Joshua will return as a stronger fighter after his title defeat against Oleksandr Usyk on Saturday.
The 31-year-old Briton lost his IBF, WBA and WBO championship belts to his more experienced former cruiserweight opponent.
The 34-year-old Ukrainian was a convincing winner against what appeared to be a reluctant and reserved Joshua, and won comfortably on points.
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Joshua is expected to enforce a rematch clause for another fight in early 2022, but boxing figures such as David Haye, Eddie Hearn and Frank Warren believe he faces a difficult task to come back dangerous enough to win.
Speaking to Sky Sports, Eubank Jr believed there was no reason to panic for Joshua, saying: "He is a career professional. He has been in the game long enough to know what to do, with or without his trainer. That's not an excuse he will use. It just wasn't his night. You can't win them all.
"The only fighter I can think of who won them all was Floyd Mayweather. You take your losses and come back stronger. That's exactly what he is going to do."