SIOUX FALLS, S.D., October 31, 2026 (Media Release)
The MarketBeat Open semifinals on Saturday feature the No. 5 seed from Canada, an unseeded American, the No. 1 collegiate player in the country from Switzerland and a qualifier from Slovenia in his first career Challenger semifinal.
In the first semifinal (after noon doubles final), Swiss native Dylan Dietrich who is the No. 1 collegiate player in the country at the University of Virginia, plays Aidan Mayo of Sacramento. Dietrich has yet to lose a set (6-0) this week while Mayo has only dropped one set.
Dietrich, a 22-year-old senior from Zurich, defeated former World No. 39 J.J. Wolf 6-2, 7-5 in the quarterfinals after posting his first career Top 100 win over top seed and World No. 94 Jenson Brooksby in the second round. He comes in on an eight-match winning streak and he has compiled a 16-3 record in his last five tournaments since July 20, highlighted by his first career Challenger title in Columbus, Ohio on October 4.
Come for the rally, stay for the lob 🤩
Dylan Dietrich finishes the point in style in Sioux Falls
#ATPChallenger | @swiss_tennis https://t.co/B4IrNsyJ5x
— ATP Challenger (@ATPChallenger) October 30, 2026
Mayo hit 10 aces and saved all nine break points faced en route to a 6-3, 6-4 victory over Dutch teenager Mees Rottgering to advance to his second Challenger semifinal of the season. In August, he captured his second career Challenger title in Kingston, JAM as a lucky loser.
In the second semifinal, No. 5 seed Liam Draxl meets No. 554-ranked Slovenian qualifier Sebastian Dominko. The 6’8” left-hander defeated German Max Hans Rehberg 7-6(4), 6-4, to advance to his first career Challenger semifinal in his second main draw. Dominko has yet to drop a set in the main draw (6-0).
Draxl advanced to his fourth Challenger semifinal of the season by defeating No. 3 seed Darwin Blanch 6-3, 3-6, 6-0. It’s the second straight time the Canadian beat Blanch in Sioux Falls after a 6-4, 6-4 first round win last year. Draxl, who is 1-2 in Challenger semifinals this season, will try to reach his second Challenger final after a runner-up on home soil in Winnipeg in July.
In Saturday’s doubles final, No. 4 seeds Jarno Jans of the Netherlands and Joran Vliegen of Belgium take on No. 2 seeds Miguel Reyes-Varela of Mexico and Reese Stalder of Newport Beach, Calif.
