HI
I have had A0 Tennis since it came out earlier this year. It was awful a few months ago and ive just gone on now and after 20 or so updates it is amazing. you have to play it to really believe it. I did not think this was possible. The update yesterday has fixed most of the issues for me and its now so great that I think it rivals Top spin 4. The rallies are so tense now and I love the serving and the ability to go back and recover shots from behind the baseline.
This must be considered for a tour now. I think it now beats Tennis Elbow which was my previous benchmark for gameplay. However AO does have a learning curve but once you get it it just clicks
Here is some gameplay....there are now lots on Youtube, and it has the most amazing customisation and sharing tools for players and courts.
https://www.youtube.com/watch?v=88v38fvAiv8