Mark Anderson scored a big upset by defeating defending champion Alex Kolquist Saturday to advance to Sunday’s match-play semifinals at the 95th annual Arrowhead Invitational at Ridgeview Country Club in Duluth.

This one wasn’t even close, either, as Kolquist struggled with windy conditions and Anderson seized the day as temperatures pushed upwards of 90 degrees at Ridgeview.

In Sunday’s semifinals, Anderson will take on Dan Anderson (no relation), while in the other semifinal, Scott Pavelski will take on Taylor Sundbom, a three-time Arrowhead champion. The championship semifinals are set to begin at 7:50 a.m. Sunday at Ridgeview.

In the senior championship semifinals, three-time senior champion Bob Seitz takes on Mark Kolquist and Gary Carlson takes on Tom Kero.

This is a special year for Ridgeview Country Club as it is the club’s 100th year anniversary and this is Ridgeview’s signature event, an invite-only tournament reserved for top amateurs.