25th-Seed Mari Humberg Upsets No. 3 Kaitlyn Christian, Reaches Round of 16

Mari Humberg pulled off a major upset at the PPA Carvana Mesa Cup, beating No. 3 seed Kaitlyn Christian 11-9, 2-11, 11-8 in the Women’s Singles Round of 32 on February 18 at the Arizona Athletic Grounds to advance to the Round of 16.

Humberg set the tone in the opening game, using extended rallies and precise placement to take game one 11-9. Christian responded in a dominant second game, winning 11-2 and forcing a decider. In the third game Humberg leaned on patience and a consistent tempo to close out the match 11-8 and end Christian’s run in the tournament.

The win came with clear stakes: Humberg entered the match as the No. 25 seed while Christian was seeded No. 3. An Instagram post celebrating the result framed the outcome as an upset of “last week’s champion,” with the caption reading, “UPSET ALERT #25 Mari Humberg defeats last week's champion, #3 Kaitlyn Christian 11-9, 2-11, 11-8 to advance to the Women's Singles Rd.16‼️” The post was shared from Humberg’s account, @marihumberg.pb.

Humberg, who coaches as well as competes, leaned on the strategies she teaches. Match observers noted she “set the pace with extended rallies and precise placement” in the opener and that her “patience and consistent tempo” in the decider proved decisive. After the win Humberg said, “Thank you for the win, it's a neutraliser. She's definitely better than I am at singles, but I think when the conditions are tough like this, it's kind of anyone’s game, so got it done today… hoping for more tomorrow.”

The victory advances Humberg into the Round of 16 alongside other headline winners from the PPA Carvana Mesa Cup. Tournament coverage from the event also highlighted players such as Kiora Kunimoto, who delivered a statement win to reach the same stage, underscoring the depth and unpredictability at this stop on the PPA Tour.

Photos and social reaction circulated from Humberg’s Instagram account @marihumberg.pb, where the upset caption and images captured the immediate reaction. Note that some reports list the venue as Arizona Athletic Grounds while others use the variant Arizona Athletics Ground; the match date reported was February 18.