[chrisco255]

Why wouldn't they just use actual replay footage for that and not some generated sprite?

Simulated match ups have been done on pro sports video games for years. But they're not that useful because a model is not reality.

[renewiltord]

Presumably:

* Hard to find all replays against that shot

* Time consuming to review

This would work as compression over that space. However, I don't watch tennis and know nothing about sport. This may be an insignificant improvement.