Hi, the current version of Doroto does not support tournaments for singles and probably it will stay only for doubles also in the future until there is a strong demand from other users. We, in our tennis club, organize only tournaments for doubles since most of us are in age 40+. Because it seems that all plugins intended for tennis struggle with low number of active installations here on WP page, so I don′t think that such demand from significant number of users will arise in the future.
I haven′t played paddle and so I don′t know if there is a difference in counting. Do you need to add something to use it with paddle for doubles?