In a video game, you can consider there is a bug/pb when a user, using one or 2 technics (lift + far away baseline + short acc) becone invincible...
Is there anybody who succeed to beat this player ? i don't think so !
Is there any player in reality who is invincible ? No, neither Federer nor Nadal nor Djoko ! NO-BO-DY
So in this case, we can see it's not realistic, there is a pb
PS : the score is not a pb coz i'm not a good player