Michael Antonius
| Country (sports) |  United States |
|---|---|
| Born | January 1, 2010 New York City, United States |
| Height | 1.91 m (6 ft 3 in) |
| Plays | Right-handed (two-handed backhand) |
| Prize money | US $11,684 |
| Singles | |
| Career record | 0–0 |
| Career titles | 2 ITF |
| Highest ranking | No. 670 (August 24, 2026) |
| Current ranking | No. 670 (August 24, 2026) |
| Grand Slam singles results | |
| US Open | Q2 (2026) |
| French Open Junior | F (2026) |
| Wimbledon Junior | 1R (2026) |
| US Open Junior | 1R (2025) |
| Doubles | |
| Career record | 0–0 |
| Career titles | 1 ITF |
| Highest ranking | No. 1,173 (April 13, 2026) |
| Current ranking | No. 1,200 (August 24, 2026) |
| Grand Slam doubles results | |
| French Open Junior | 1R (2026) |
| Wimbledon Junior | F (2026) |
| US Open Junior | QF (2025) |
| Last updated on: August 24, 2026. | |
Michael Antonius (born January 1, 2010) is an American tennis player. He has a career high ATP singles ranking of No. 670 achieved on August 24, 2026 and a career high ATP doubles ranking of 1,173 achieved on April 13, 2026.[1]
He also has a career-high ITF junior combined ranking of No. 3 achieved on July 13, 2026.[2]
Early life
Antonius was raised in Buffalo, New York. His father, who is Norwegian, is a psychologist at the University at Buffalo.[3] Antonius trains at the USTA National Campus in Orlando, Florida.[4]
Career
In 2024, Antonius won the boys' singles title at the Petits As, becoming the first American to do so since Victor Lilov in 2018.[5]
2026
Antonius won his first ITF singles title at the M25 in Bakersfield, California, becoming the youngest American male to win an ITF title at the age of 16.[3][4] He reached the 2026 French Open boys' singles final, but lost to Guto Miguel.
Junior Grand Slam finals
Singles: 1 (1 loss)
| Result | Year | Tournament | Surface | Opponent | Score |
|---|---|---|---|---|---|
| Loss | 2026 |  French Open |
Clay |  Guto Miguel |
3–6, 4–6 |
References
- ↑ "Michael Antonius | Overview | ATP Tour | Tennis". ATP Tour.
- ↑ "Michael Antonius". ITF. Retrieved July 8, 2026.
- 1 2 Wertheim, Jon (April 15, 2026). "Tennis Mailbag: Meet Michael Antonius, the American Teen Who Just Made History". Sports Illustrated. Retrieved June 8, 2026.
- 1 2 Kapetanakis, Arthur (March 26, 2026). "Michael Antonius makes history as youngest American to win ITF men's title". USTA. Retrieved June 8, 2026.
- ↑ Kapetanakis, Arthur (February 2, 2024). "Michael Antonius wins Les Petits As boys' singles title". USTA. Retrieved June 8, 2026.