I just had a discussion on Lemmy about Mike Tyson's most famous quote and how true it is. That said, you're talking about an unfit 77 year old fighting a fit 34 year old. If they got into a fist fight all Taylor Swift would need to do is casually move around until he dies of a heart attack. Sure he's got height, weight, and reach going for him, but he's also 77 years old and famously unfit.