Anthony Joshua wants an immediate rematch with Oleksandr Usyk after being dethroned in their heavyweight bout, while the British star was upbeat despite the surprise defeat.
Joshua was stripped of his IBF, WBA and WBO titles by Usyk, who scored a unanimous points decision in just his third fight since stepping up to heavyweight in London on Saturday.
Usyk – a former undisputed cruiserweight champion – handed Joshua his second career loss, having previously been stopped by Andy Ruiz Jr. in June 2019 before reclaiming the belts in their rematch.
Joshua is hoping to do so again with Usyk after falling to 24-2 in front of more than 66,000 fans at the Tottenham Hotspur Stadium.
"A 100 per cent, a 110 per cent," Joshua said during his post-fight news conference.
"I'm ready to get back to training. Because I did 12 rounds, my lungs, and everything... I'll be in a good place even I get back to training and pick up where we left off."
Joshua had hoped to be taking on WBC holder Tyson Fury in a lucrative showdown to decide an undisputed champion in the heavyweight division, but that plan was scuppered when his rival was ordered to face Deontay Wilder for a third time instead.
Usyk was the back-up option picked to bridge the gap, the mandatory challenger coming with a superb pedigree but limited experience at heavyweight.
Unbeaten as he improved to 19-0, Usyk's southpaw stance and smooth footwork troubled Joshua from the outset and a flurry of punches left his star opponent on the ropes and desperate for the bell in the final round.
"It's a great lesson today. It was a great lesson," Joshua told reporters.
"I know, we can look at it from a negative point of view, but for me, I gotta take it as a great lesson and build on that situation... I'm not a weak person. I don't want to be in my bedroom sulking about the situation.
"I'm looking at it like a great lesson, go back, study and rejuvenate myself because nobody's gonna do it for me."