Presentation is great! Lots of things going on which I'm sure would make a tennis fan happy. I don't really know anything about tennis so it was all a bit too much info for me.
I thought the intro questions would be annoying when I saw how many there were, but it was fun to create a backstory! (Would be nice to see this have a bigger effect during matches) Character customizer is a nice touch. Wasn't sure if I should "Continue" or "Enter tournament" from first screen, bit of information overload. Watching the match was kinda cool. Having the choices inbetween rounds was nice, although I don't see why you would choose anything other than the highest chance one. I left after the first match because I felt like I had seen everything (might need more features or choices teased, or maybe something to decide upon between matches).
Nice work!