https://www.youtube.com/watch?v=sgnH1-gLxfA
Only a father could think of this for a young kid (well, maybe not
Anyway, there have been various examples of a father training a son. Who are the ones that stand out in your mind, whether they are great fighters or not?
The top two for me are the Calzaghe's & the Lomachenko's.
And knowing this site, there is no strict criteria