This sub-story occurs when Vegeta regains control of the cyborg saga in Dragon Ball Z Kakarot. As usual, check out your community boards and technics before you get back into the adventure. The saiyen will slowly get back on his feet, with a friendly fight against Tien shinhan.
The meaning of training
Good old Tien shinhan unfortunately doesn't have much going for him, not to mention the fact that you should be around level 34/35, while he's only level 31. Just be careful with his Dodompa beam. A simple dodge on the side will help you avoid it easily. Take this match for what it is: a training session. Take the opportunity to review Vegeta's techniques. You won't win any soul emblems at the end of this fight, you will however pocket 3 D medals at once.