As one who played lot of tennis during my college years, Vivek hits decent forehand shots for an amateur.
I bet he is weak on backhand shots. He hit none in the video. A 2 handed back hand shot is lethal.
The forehand, which is all I saw in the vid, has been coached and he’s hit 1000s of them. The grip is far different from Martina’s era. Racquet technology changed and so did topspin emphasis.
This is a guy in his 30s. It is solid play. The sun is a notorious sapper of energy in tennis. Guys don’t play without shirts unless they are screwing around. Or showing off.
I think he deserves credit for having a commitment to the game even while pursuing career. Tennis at his level is not hit-and-giggle.