Kell Brook marked his return to boxing with a brutal knockout of Mark DeLuca last night at the FlyDSA Arena in Sheffield.Having not fought since December 8, 2018, where he defeated Michael Zerafa via unanimous decision, all eyes were on the Sheffield-born fighter and his return to the ring.However, there were no real signs of ring rust as he looked comfortable throughout, although it must be said DeLuca wasn't a truly formidable opponent for someone of Brook's level.Having controlled most of the fight, it was finally in round seven when Brook put the American out of his misery, with an absolutely brutal left across the head.Immediately, DeLuca hit the canvas, and the referee simply had no other option but to wave the fight off.The punch itself in normal speed was brutal, but of course, it has now been given the slow-mo treatment, and it looks 10x worse.Take a look for yourself below.

So a successful night for Brook in his return to boxing, and now all the questions will be regarding what's next for the Brit.

Maybe, just maybe we could start talking about a Brook vs Amir Khan fight, but we've been saying that for years now.