The Badgers were tied 57-57 after three quarters but pulled away to win the first of their two games in New Zealand. They will next play a Breakers selection in the North Island city of Tauranga on Thursday before playing three games in Australia on the 12-day trip.
Sophomore Brevin Pritzl led Wisconsin with 28 points, while Ethan Happ added 17.
Wisconsin coach Greg Gard used Pritzl, Happ, D’Mitrik Trice, Khalil Iverson and Alex Illikainen in a new-look starting formation. The team is building a new frontline around Happ following the departure of big men Nigel Hayes and Vitto Brown.
The NCAA allows teams to make exhibition tours overseas every four years.
Wisconsin’s last overseas trip, to Canada in 2013 when it was also replacing much of its starting lineup, preceded the first of its back-to-back Final Four appearances.
The Breakers have won the Australian National Basketball League in four of the last seven years.