Freezing up

Updated review: used to play this game a lot, up to a year ago, enjoyed it a lot but after defeating all the players and reaching the top the only thing left was playing tournaments and trying to earn higher rankings based on the number of shots taken to win a tournament. I eventually deleted the app because there was nothing new about it, other than that it was fun.
Previously review:
Two yrs ago on the iPhone 5 I played this game and was getting good. Some players were difficult but the more I played the better I learned strategies for making shot combinations that could beat better players. Then suddenly the game froze up and I couldnt play it anymore.
A couple weeks ago I remembered how much I enjoyed this game and with a new iphone I thought I would try it again. I picked up quickly where I left off, moved up in levels fast. Found some new players, learned how to defeat players I had struggled with before. Then yesterday in the middle of a tournament the game froze. Today it was working for one game but froze up again. If this keeps up I will delete it again.

Weeeeeeeeeeeeeeeeeeeeeeeee! about Hit Tennis 3, v3.26