Gennadiy Golovkin looking spry in camp ahead of Sergiy Derevyanchenko fight

He’s 37, and c’mon, we all know any fight from here on in could be that “got old overnight” outing.

But Gennadiy Golovkin has been grooving in camp, and at the NYC open workout at MSG on Tuesday, he certainly looked like a person who was in a zone of contentment and like he was mentally on track to show Saturday that he is still a top tier middleweight ace.

“I’m happy to be back home at Madison Square Garden,” the Kazakh warrior stated. “These are the best fans, they know what good boxing is all about. Me and Sergiy Derevyanchenko are going to give them a great gift with a great fight.”

But still — 37.

Not to be that doom and gloomer, but let’s just keep it real. Even a guy with no vices, no boozing, no junk food junkie fixes bloating him up between bouts, aging gets every last one of us. Father Time is the sternest arbiter for athletes in fight sport. But word on the street is GGG isn’t looking like his reflexes are dimming with age.

One camp insider told me that GGG tells people that when the time comes, he will know it, and will be smart about reacting to aging. But he seems to like what Johnathon Banks has brought to the table in their first full camp together. The insider used the word “gliding” in regards to how GGG has been moving.

Banks has been happy, I’m told, because GGG is moving more, and when he moves more, he hurls more volume. The guy doesn’t want to leave the gym, and yes, I asked, I made sure, we’re not getting into a thing where he’s over-training, are we? You recall Buddy McGirt has said Sergey Kovalev has been fighting smarter, not harder, because he has asked him to do less, and give his body more rest time.

“Banks hasn’t been teaching him new things, he’s been reminding him of the things he used to do,” the insider said of the father of three, who in his off time is an avid hockey dad.

Fans might want to be on the lookout especially for body work. GGG has been talking about one of his favorite stoppages, the 2013 body shot that rattled Matthew Macklin’s internal organs.

“I don’t think this goes to decision,” the insider told me. Yep, GGG might be an older dog, but he’s been looking and acting spry, and that’s not good news for Derevyanechneko.

Golovkin (39-1-1, 35 KO) from Karaganda, Kazakhstan and Brooklyn-based Ukrainian Sergiy Derevyanchenko (13-1, 10 KO) will clash for the vacant IBF world middleweight title on Saturday, Oct. 5, live from Madison Square Garden in New York and streamed exclusively on DAZN.