Sometimes you cant actually predict your opponents line-up, even if your scouting skills are pretty much world renowned , there are scenarios that they will their SG in PF/C, or PG to SF/PF or bigs Going on smaller positions , it depends if he's training it or for other reasons . So this suggestion would be a great help also on countering your opponents offense and line-up , it would be more accurate , This player guarding this player , Superstar vs. Superstar . You have plenty of options , You can still let your player guard random players or key players on or off the court without some doubt of having Mismatch-ups .