Iowa coach Steve Alford wants the Big Ten Conference to enforce its new sportsmanship rules when the Hawkeyes visit Michigan tomorrow night. Hawkeye guard Pierre Pierce has been the subject of taunts from opposing student sections after his legal problems of last year. Alford says you can’t single out a player after the rules were passed in the springs. Alford says chanting is one thing, but picking out a student athlete is another, and that’s what the rule is there to stop. Alford says he did not raise the issue in last week’s game at Illinois but told Big Ten Associate Commissioner Rich Falk that he wants the rule enforced.Iowa is 3-2 in the Big Ten