The Grinnell College men’s tennis team is favored to win the Midwest Conference championship this weekend in Madison, Wisconsin. The Pioneers are 21-and-five, a school record for victories, and open the team competition Friday against St. Norbert.Grinnell coach Andy Hamilton says they have five or six guys who have already been to the championships, so they have experience. The singles competition is Saturday. The singles players play all their counterparts to come up with a champion.