Shame that lunges and splits is considered a great point... What technical ability did he display exactly?
The timing/placement required to dive to a ball and actually get it back in court, the balance to maintain body trajectory to the ball, the speed and recovery to get in position for the next shot, the anticipation to read the next shot, etc.
Tennis isn't 100% about "technical ability" anyway
It's not a video game. Determination, improvised shots, and athleticism can be appreciated too.
Just because some players don't want to dive for fear of scuffing their shoes or getting a scrape, doesn't mean that people can't appreciate the plays of those who aren't afraid to get down and dirty...