Have your career stats as follows:

Speed     : 10
Focus     : 10
Service   : 8
Forehand  : 10
Backhand  : 10
Precision : 10
Power     : 10 

Disregard all the other attributes, especially Stamina. As long as you remain focused on 
what your player and CPU is doing and try to win the point as soon as possible, Stamina 
does not matter. Reflexes do not matter also, unless you really like coming to net. 
However, most players probably choose to use the baseline and only come up to the net 
when the other player or CPU does a dump volley. Volley is not really that useful either,
especially if you are a baseline player. Spins are only useful if you know exactly when 
and how to use them (like the lob), so disregard these attributes. Precision is fairly 
important so. If you want to divide the Focus and Precision with 5 each, then it may be 
useful.