Your comment does not warrant downvotes. The results do resemble the video capture (rotoscoping?) technique used in the 1992 videogame Mortal Kombat, and it's worth pointing that out: https://youtu.be/Tj3_0AmiJbg?t=5

But of course Mortal Kombat's sprites were not being generated in real-time through a flexible machine learning model.

But in Mortal Combat the players were casting shadows. The lack of shadows below the tennis players' feet makes it look like a green screen was used.

The tech is different but the end result is largely the same. I immediately thought of Mortal Kombat as well when I saw the video.

tekken is more impressive

Mortal Kombat 3 (and previous ones) was just digitized sprites with no logic in between animations, certainly nothing comparable to that.