Jordan Thompson has been ranked as high as 26 in the world and has career wins over Rafael Nadal and Stefanos Tsitsipas. Thompson made it to the Round of 16 at Wimbledon this year where he lost to American Taylor Fritz. Competing in all four Grand Slams in 2025, he also made it to the Round of 16 at the US Open in 2024, losing to Alex de Minaur. In 2024, Thompson partnered with Max Purcell to win the US Open doubles title after finishing second at Wimbledon.

Rinky Hijikata has been ranked as high as 62 in the world in singles and partnered with Jason Kubler to win the 2023 Australian Open doubles title. He also made it to the doubles final at this year's Wimbledon. Hijikata competed in the main draw at all four Grand Slams this year, making it to the second round at Wimbledon. 

Christopher Eubanks makes his second appearance in Sioux Falls after being the top seed in 2024. A former Wimbledon quarterfinalist, Eubanks has been ranked as high as 29 in the world and has one ATP Tour title coming in Mallorca, Spain. He has career wins over Taylor Fritz, Ben Shelton and Stefanos Tsitsipas.

Brandon Holt returns to Sioux Falls after reaching a career-high ranking of 99 this past June. Holt competed in the main draw at Wimbledon and the US Open this year. He has two challenger titles in 2025 coming in India and Thailand improving his career total to 10 ATP Challenger titles. He is the son of two-time US Open Champion Tracy Austin. 

Liam Draxl returns to Sioux Falls after climbing from 259 in the world at last year's tournament to 119 now. The 4th ranked Canadian player in the world has set a record this year by reaching seven ATP Challenger Tour finals, claiming the title in Winnipeg in July. Draxl partnered with Cleeve Harper to win the 2024 MarketBeat Open doubles title and the duo has since won three additional doubles titles. 

Mitchell Krueger returns to Sioux Falls where he was the two-seed last year but fell to qualifier and eventual champion Borna Gojo in the first round. Krueger has five career ATP Challenger Tour titles and has twice reached the second round at the US Open.

Murphy Cassone is making his way back to Sioux Falls after making a rapid rise up the world rankings since last year's tournament. Cassone was a semifinalist at last year's MarketBeat Open which came the week after winning his maiden ATP Challenger Tour title in Calgary. 

Patrick Kypson makes his return to Sioux Falls after being sidelined due to injury for part of the past year. The former Texas A&M standout has 5 career ATP Challenger Tour titles. Kypson had reached a career high ranking of 133 in the world in 2024. 

Rafael Jodar is a rising 19 year old star from Spain who won the 2024 US Open Junior Boys Singles Title. This past summer he won his first ATP Challenger Tour title in Greece.

Martin Damm has risen more than 200 spots in the ATP Tour rankings since August. He made it to the second round at this year’s US Open where he lost to Francis Tiafoe; 6-4, 7-5, 6-7(8), 7-5. He recently advanced to the finals of the Columbus Challenger in September.

Michael Mmoh has been on the road back from injury after reaching 81 in the world in 2023. Had a great start to 2025 reaching the round of 16 at both the ATP 250 in Delray Beach and the ATP 500 in Dallas.

Darwin Blanch is one the the United States' brightest rising stars. The 18-year-old won the USTA Boys 18-under National Hard Courts title this past summer which earned him a wild card into the main draw at the US Open. In 2022, Blanch became the youngest player in history to earn an ATP Tour ranking point at 14 years old.

Michael Zheng was last year’s NCAA Division I singles champion beating out 2024 MarketBeat Open runner-up Colton Smith and quarterfinalist Ozan Baris. He has risen more than 500 spots in the ATP Tour rankings this year, currently ranked 178 after winning 3 straight Challengers in Chicago, Columbus and then Tiburon earlier this month. He also finished second in Little Rock.

Dmitry Popko looks to get back to his Spring form as he captured the title at the ATP 125 in Morelia in March by beating Adrian Mannarino and Terence Atmane en route to the title. He followed up with a runner-up finish the following week in Morelos.

Abdullah Shelbayh had a tough start to 2025 but has turned things around and captured the title in Las Vegas in September which he followed up with a semifinal appearance in Tiburon. Shelbayh is coached by former world number 7 Fernando Verdasco.

Jay Clarke won 21 of 23 matches and captured 3 titles at the Future’s level early in the year. He went on to win Challenger titles in North Macedonia and finished second in Romania. He competed in the main draw at Wimbledon this year.

Jack Pinnington Jones recently won the Challenger title in Winston Salem in September. He made it to the second round at Wimbledon this year and captured the Challenger title in Nattingham, Great Britain in July following Wimbledon.