Errol Spence didn't he think he was razor sharp against Kell Brook
Spence Jr took the IBF world welterweight title at Brammall Lane after a clinical display.
Brook suffered a nasty eye injury as he relinquished his belt in the 11th round of a thrilling fight.
After his defeat to Gennady Glolovkin in September, Brook dropped from middleweight to welterweight.
Spence has now gone 10 bouts without going to the scorecards and is unbeaten in 22 contests.
And when asked for his thoughts on the fight, he said: “I give Kell all the credit, and the hardcore fans here.
“A true champion goes anywhere to fight. He has gone to America and fought so I came here.
"I didn't feel that sharp tonight, but true champions still win.
"He was tired, fatigued but kept firing shots. The goal is to unify and become undisputed welterweight champion of the world."
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Amir Khan would be open to fighting Kell Brook
I didn't feel that sharp tonight, but true champions still win
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Errol Spence Jr
Meanwhile, Amir Khan welcomed the chance to take on Brook.
“I’d like to fight him a 147lb,” he told Sky Sports.
“Kell has had the loss now and I’m sure he’ll go into another fight which will be a nice, tune-up fight.
“Maybe next summer we could do it.
“It depends on the dates because there’s a lot of pay-per-view fights on.
“Amir Khan v Kell Brook is a pay-per-view fight and I really believe that next summer it would make sense.
“Kell needs some time now to relax and chill out but next summer might give him enough time to get a tune-up fight and then go into a big fight.”