I bought these for cross training. Use them for boxing, and they do decently for everything else. Some running, sprinting, jump rope. Decent all around shoe.
The amazon page has a variety of other colour schemes for the XI as well. I don't know if either Nike or Amazon actually have any stock left. If they don't I'm sure there's other places you could find a pair but the shoe isn't as sought after unlike other sneakers so you shouldn't have too much trouble finding a pair (I hope).
George Hill is signed/sponsored by Peak shoes. I actually just looked them up yesterday, they're around $100-110, they've got three really nice colorways, and they have size 10's around 20% off on Amazon. Let me know if that link works or not, I'm on mobile.
Looks like the Adidas D 773 II based on the silhouette of the shoes along with the traction pattern matching. At 1m 2s you can see the traction pattern of the shoes as number 15 goes to receive serve. If nothing else, I'm pretty sure they're a shoe made by Adidas.