H2H data updated: 2026-09-01 00:00 UTC

Learner Tien vs Adolfo Daniel Vallejo H2H: 0-1

Adolfo Daniel Vallejo holds a 1–0 lead over Learner Tien in their ATP head-to-head. Across 1 main-draw meeting, Adolfo Daniel Vallejo leads 1–0 on clay. Most recently, Adolfo Daniel Vallejo won the 2026 Madrid Open second round 6-4 6-3.

United States Age 20 Left-Handed 180 cm / 5'11"
H2H
0 1
1 main draw meetings
Paraguay Age 22 Right-Handed 185 cm / 6'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Adolfo Daniel Vallejo #96 6-4 6-3 Learner Tien #21 Match data Apr 25, 2026 R64 Madrid Open Masters 1000 Clay

Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.

Career Comparison

Player Current Peak Pts Elo W L Win % GS 1000 including documented historical predecessor categories Finals 500 including documented historical predecessor categories 250 including documented historical predecessor categories Titles
Learner Tien #15 #12 2,565 1,974 62 42 59.6% 0 0 0 0 2 2
Adolfo Daniel Vallejo #60 #60 954 1,663 11 11 50.0% 0 0 0 0 0 0

Career Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.

Age Learner Tien Adolfo Daniel Vallejo
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 2022 0–1 0.0% 1,495 0 0
17 2023 0–1 0.0% #452 1,479 0 0
18 2024 3–2 60.0% #122 1,567 0 0
19 2025 32–23 58.2% #28 1,910 0 1
20 2026 27–15 64.3% #15 1,917 0 2
22 2026 11–11 50.0% #60 1,643 0 0

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.

Age Learner Tien Adolfo Daniel Vallejo
Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Pressure+ Schedule Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Pressure+ Schedule
16 2022 1496 106.9 +1.66 0.00 0.741 44.9% 25.0% -2.00 -0.09
17 2023 1480 110.3 -1.68 +2.67 0.642 41.8% 0.0% -3.67 -0.10
18 2024 1567 118.8 -1.17 +0.87 0.996 49.6% +23 50.0% -0.07 2–0 1–1 -0.03
19 2025 1911 146.7 -1.79 +0.93 0.946 49.5% +10 -354 -269 54.1% +0.09 10–6 (63%) 17–10 (63%) -0.50
20 2026 1918 151.6 -0.61 +3.17 1.050 50.9% +44 -169 -274 57.3% +0.38 12–4 (75%) 18–6 (75%) +0.71
21 2025 1485 99.3
22 2026 1644 127.0 -1.27 +1.69 1.023 50.5% -40 +25 50.0% +0.14 1–4 (20%) 3–5 (38%) +0.39
Career 1974 148.5 -1.22 +1.89 0.985 50.0% +23 -234 -271 54.2% +0.13 24–10 (71%) 36–17 (68%) 120.7 -0.01 1664 120.4 -1.27 +1.69 1.023 50.5% -40 +25 50.0% +0.14 1–4 (20%) 3–5 (38%) 95.6 +1.77

Career Rivalries

Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.