MADISON, Wis. — The University of Wisconsin men’s basketball coach, Greg Gard, said the death Tracy Krueger “leaves an enormous hole, not only in the basketball community in southwest Wisconsin but athletics in general in that area.” Kruger died while officiating a high school game Monday night. Gard remembered Krueger coaching him at basketball camps in the early 1980s. Gard posted at a sign with the message “In Memory of Tracy Krueger” in the stands behind the Wisconsin  bench Tuesday in a game against Penn State.