Topzle Updated: Wikipedia source
Learner Tien (born December 2, 2005) is an American professional tennis player. He has a career-high ATP singles ranking of world No. 28, achieved on 10 November 2025 and a doubles ranking of No. 343, achieved on 18 August 2025. He is currently the No. 4 American singles player. Tien has currently won one ATP Tour singles title at the 2025 Moselle Open.
| W | F | SF | QF | | RR | Q# | P# | DNQ | A | Z# | PO | G | S | B | NMS | NTI | P | NH |
| Tournament | 2022 | 2023 | 2024 | 2025 | SR | W–L | Win% |
| Grand Slam tournaments | |||||||
| Australian Open | A | A | A | 4R | 0 / 1 | 3–1 | 75% |
| French Open | A | A | A | 1R | 0 / 1 | 0–1 | 0% |
| Wimbledon | A | A | A | 2R | 0 / 1 | 1–1 | 50% |
| US Open | 1R | 1R | 1R | 1R | 0 / 4 | 0–4 | 0% |
| Win–loss | 0–1 | 0–1 | 0–1 | 4–4 | 0 / 7 | 4–7 | 36% |
| ATP Masters 1000 | |||||||
| Indian Wells Open | A | Q1 | A | 1R | 0 / 1 | 0–1 | 0% |
| Miami Open | A | Q1 | A | 1R | 0 / 1 | 0–1 | 0% |
| Monte-Carlo Masters | A | A | A | A | 0 / 0 | 0–0 | – |
| Madrid Open | A | A | A | 1R | 0 / 1 | 0–1 | 0% |
| Italian Open | A | A | A | 2R | 0 / 1 | 1–1 | 50% |
| Canadian Open | A | A | A | 4R | 0 / 1 | 3–1 | 75% |
| Cincinnati Open | A | A | A | 2R | 0 / 1 | 1–1 | 50% |
| Shanghai Masters | NH | A | A | 4R | 0 / 1 | 3–1 | 75% |
| Paris Masters | A | A | A | 2R | 0 / 1 | 1–1 | 50% |
| Win–loss | 0–0 | 0–0 | 0–0 | 9–8 | 0 / 8 | 9–8 | 53% |
| Career statistics | |||||||
| Tournaments | 1 | 1 | 2 | 24 | Career total: 28 | ||
| Titles | 0 | 0 | 0 | 1 | Career total: 1 | ||
| Finals | 0 | 0 | 0 | 2 | Career total: 2 | ||
| Overall win–loss | 0–1 | 0–1 | 5–4 | 32–23 | 1 / 38 | 37–29 | 56% |
| Year-end ranking | 860 | 452 | 122 | 28 | |||
| Legend |
| Grand Slam (0–0) |
| ATP 1000 (0–0) |
| ATP 500 (0–1) |
| ATP 250 (1–0) |
| Finals by surface |
| Hard (1–1) |
| Clay (0–0) |
| Grass (0–0) |
| Finals by setting |
| Outdoor (0–1) |
| Indoor (1–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Sep 2025 | China Open, China | ATP 500 | Hard | Jannik Sinner | 2–6, 2–6 |
| Win | 1–1 | Nov 2025 | Moselle Open, France | ATP 250 | Hard (i) | Cameron Norrie | 6–3, 3–6, 7–6(8–6) |
| Result | Date | Tournament | Surface | Opponent | Score |
| Loss | Dec 2024 | Next Generation ATP Finals, Saudi Arabia | Hard (i) | João Fonseca | 4–2, 3–4(8–10), 0–4, 2–4 |
| Legend |
| ATP Challenger Tour (3–1) |
| ITF WTT (7–1) |
| Finals by surface |
| Hard (10–2) |
| Clay (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | Jul 2024 | Cranbrook Tennis Classic, US | Challenger | Hard | Nishesh Basavareddy | 4–6, 6–3, 6–4 |
| Win | 2–0 | Sep 2024 | Las Vegas Challenger, US | Challenger | Hard | Tristan Boyer | 7–5, 1–6, 6–3 |
| Win | 3–0 | Oct 2024 | Fairfield Challenger, US | Challenger | Hard | Bernard Tomic | 6–0, 6–1 |
| Loss | 3–1 | Nov 2024 | Knoxville Challenger, US | Challenger | Hard (i) | Christopher Eubanks | 5–7, 6–7(9–11) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Oct 2022 | M15 Fayetteville, US | WTT | Hard | Toby Samuel | 3–6, 3–6 |
| Win | 1–1 | Jun 2023 | M15 Irvine, US | WTT | Hard | Quinn Vandecasteele | 7–5, 6–2 |
| Win | 2–1 | Oct 2023 | M15 Norman, US | WTT | Hard (i) | Duarte Vale | 7–6(8–6), 6–2 |
| Win | 3–1 | Nov 2023 | M25 Columbus, US | WTT | Hard (i) | Jacob Fearnley | 2–0 ret. |
| Win | 4–1 | May 2024 | M15 San Diego, US | WTT | Hard | Karuê Sell | 6–7(6–8), 6–2, 6–2 |
| Win | 5–1 | Jun 2024 | M15 San Diego, US | WTT | Hard | Alafia Ayeni | 6–4, 6–7(5–7), 6–4 |
| Win | 6–1 | Jun 2024 | M15 Rancho Santa Fe, US | WTT | Hard | Matthew Summers | 6–3, 6–1 |
| Win | 7–1 | Jul 2024 | M15 Lakewood, US | WTT | Hard | Govind Nanda | 6–3, 6–3 |
| Legend |
| ATP Challenger Tour (0–0) |
| ITF WTT (4–0) |
| Finals by surface |
| Hard (4–0) |
| Clay (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Nov 2022 | M15 East Lansing, US | WTT | Hard (i) | Alex Michelsen | Joshua Goodger Emile Hudd | 6–4, 6–3 |
| Win | 2–0 | Jun 2023 | M15 Irvine, US | WTT | Hard | Bryce Nakashima | Joshua Goodger Matthew Summers | 6–4, 6–2 |
| Win | 3–0 | Nov 2023 | M25 Austin, US | WTT | Hard | Edward Winter | Sebastian Gorzny Brayden Michna | 4–6, 6–3, [10–2] |
| Win | 4–0 | May 2024 | M15 San Diego, US | WTT | Hard | Sebastian Gorzny | Robin Catry Braden Shick | 1–6, 6–3, [10–1] |
| Result | Year | Tournament | Surface | Opponent | Score |
| Loss | 2023 | Australian Open | Hard | Alexander Blockx | 1–6, 6–2, 6–7(9–11) |
| Loss | 2023 | US Open | Hard | João Fonseca | 6–4, 4–6, 3–6 |
| Result | Year | Tournament | Surface | Partner | Opponents | Score |
| Win | 2023 | Australian Open | Hard | Cooper Williams | Alexander Blockx João Fonseca | 6–4, 6–4 |
| Season | 2025 | Total |
| Wins | 5 | 5 |
| # | Player | Rk | Event | Surface | Rd | Score | Rk | Ref |
| 2025 | ||||||||
| 1. | Daniil Medvedev | 5 | Australian Open, Australia | Hard | 2R | 6–3, 7–6(7–4), 6–7(8–10), 1–6, 7–6(10–7) | 121 | |
| 2. | Alexander Zverev | 2 | Mexican Open, Mexico | Hard | 2R | 6–3, 6–4 | 83 | |
| 3. | Ben Shelton | 10 | Mallorca Championships, Spain | Grass | 2R | 6–4, 7–6(7–2) | 67 | |
| 4. | Andrey Rublev | 10 | Washington Open, US | Hard | 2R | 7–5, 6–2 | 67 | |
| 5. | Lorenzo Musetti | 9 | China Open, China | Hard | QF | 4–6, 6–3, 3–0 ret. | 52 | |