

Introduction
Learner Tien (born December 2, 2005) is an American tennis player. Tien has a career-high ATP singles ranking of No. 446 achieved on November 27, 2023. He also has a career-high ATP doubles ranking of No. 754 achieved on November 20, 2023.
Early life
Tien was born in Irvine, California to Vietnamese parents. His first name, Learner, is inspired by his mother's profession - a math teacher.His sister is named Justice after his father's profession - an attorney.
Tien started playing tennis as an infant, and won his first tournament at the Racquet Club of Irvine at the age of 5.
Junior Career
Tien had a very successful career as a junior, compiling a 76-23 win-loss record and reaching two junior Grand Slam finals, at the 2023 Australian Open and the 2023 US Open, culminating with a ranking of world no. 4 in singles. He also reached the world no. 4 ranking in doubles, compiling a 36-18 win-loss record and winning the 2023 Australian Open, partnering with Cooper Williams.
Junior Grand Slam singles results
Australian Open: F (2023)
French Open: SF (2023)
Wimbledon: QF (2022, 2023)
US Open: F (2023)
Junior Grand Slam doubles results
Australian Open:W (2023)
French Open: QF (2023)
Wimbledon: 2R (2022)
US Open: 2R (2022)
Career
2022: Grand Slam debut
At just 16 years old, Tien won the 2022 USTA Boys 18s National Championship, which earned him a wildcard into the main draw of the 2022 US Open. This made him the youngest player to compete in the men’s singles main draw at the US Open since a then 16-year-old Donald Young (also the champion at Kalamazoo) played in the 2005 US Open and the first 16-year-old to compete since Zachary Svajda in 2019. He lost in four sets to 32nd seed Miomir Kecmanović.
2023: Second US Open Appearance
Tien received a wildcard into the 2023 US Open, and lost to Frances Tiafoe in the first round.
ATP Challenger and ITF Futures finals
Singles: 4 (3–1)
| Finals by surface |
|---|
| Legend |
| ATP Challenger (0–0) |
| ITF Futures (3–1) |
| Finals by surface |
| Hard (3–1) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| ATP Challenger (0–0) |
| ITF Futures (3–1) |
| Hard (3–1) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
|---|---|---|---|---|---|---|---|
| Loss | Oct 2022 | M15 Fayetteville, USA | World Tennis Tour | Hard | Toby Samuel | 3–6, 3–6 | |
| Win | Jun 2023 | M15 Irvine, USA | World Tennis Tour | Hard | Quinn Vandecasteele | 7–5, 6–2 | |
| Win | Oct 2023 | M15 Norman, USA | World Tennis Tour | Hard (i) | Duarte Vale | 7–6, 6–2 | |
| Win | Nov 2023 | M25 Columbus, USA | World Tennis Tour | Hard (i) | Jacob Fearnley | 2–0 ret. |
Doubles: 3 (3–0)
| Titles by surface |
|---|
| Legend (doubles) |
| ATP Challenger (0–0) |
| ITF Futures (3–0) |
| Titles by surface |
| Hard (3–0) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| ATP Challenger (0–0) |
| ITF Futures (3–0) |
| Hard (3–0) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|---|---|
| Win | Nov 2022 | M15 East Lansing, USA | World Tennis Tour | Hard (i) | Alex Michelsen | Joshua Goodger Emile Hudd |
6–4, 6–3 | |
| Win | Jun 2023 | M15 Irvine, USA | World Tennis Tour | Hard | Bryce Nakashima | Joshua Goodger Matthew Summers |
6–4, 6–2 | |
| Win | Nov 2023 | M25 Austin, USA | World Tennis Tour | Hard | Edward Winter | Sebastian Gorzny Brayden Michna |
4–6, 6–3, [10–2] |
Junior Grand Slam finals
Singles: 2 (2 runner-ups)
| Result | Year | Championship | Surface | Opponent | Score |
|---|---|---|---|---|---|
| Runner-up | 2023 | Australian Open | Hard | Alexander Blockx | 1–6, 6–2, 6–7 |
| Runner-up | 2023 | US Open | Hard | João Fonseca | 6–4, 4–6, 3–6 |
Doubles: 1 (1 title)
| Result | Year | Championship | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|
| Winner | 2023 | Australian Open | Hard | Cooper Williams | Alexander Blockx João Fonseca |
6–4, 6–4 |