to test the new tennis elbow i started a carrer with 2 players(federer&nadal) and there seem to be a few bugs. i don´t have any mods installed.
firstly i changed nadal's date of birth to federer's that they can start at the same age.
i chose both players, game starts automatically in 1999, federer is 16 yo, nadal is 11yo

at the beginning of they their carrer's i wanted to let them play doubles together, it wasn't possible, i couldn't choose them to play with each other. i tried it every second week. some time, after 40-45 weeks it was possible, now they can play together.
in the second year when there are mandatory tournaments it happened twice that i am asked what federer wants to play (singles only, doubles only, both, none), i chose singles and doubles, then federer was entered in singles, both in doubles but nadal not in singles. even tough his ranking was better than LD.
another bug is when i started to play doubles they could enter several main draws without qualifying, tough their ranking was way too high.
and last but not least i am playing for 1,5 years right now and nadal entered twice in main draws in about 5-6 tournaments.