 Matise made her official debut at the 2000 Summer Olympics in Sydney, where she placed twenty-second in women's Mistral sailboard with a net score of 170 points.At the 2004 Summer Olympics in Athens, Matise qualified for her second Latvian team, as a 32-year-old, in the women's Mistral One Design class by receiving a berth from the 2004 Mistral World Championships in Çeşme, Turkey.Delivering a mediocre effort in the opening races, Matise posted a remarkable grade of 190 net points to pull off a twentieth-place effort in a fleet of twenty-six windsurfers.