as long as I know, in TE engine, there are only two ways to format names display.
And the info are stored in the following internal data:
- /Intern/Team1 ==> to have full name: Andy Roddick (works for single and double modes)
- /Intern/Team1s ==> to have short name: A.Rod (idem)
To only have the surname, we need to have a new internal data and this can only be done by TE developer (Manutoo).
Maybe we will have it in the next update
If you are interesting, I have a little tool that create new player.ini files with names modified among different options (surname in uppercase, ...)