Tristan Boyer vs Spencer Johnson | San Diego 2 Round of 32

San Diego 2 · CHALLENGER · Round of 32

USA8

Tristan Boyer

#208ATP

1561ELO

1525Hard ELO

$233kYTD

$1.1MCAREER

25 yrs · 188 cm · Right-handed

Last 10

LWLLLWLLWW

—

Sets

Tuesday, 22 September 2026 · 15:00

hard

USA

Spencer Johnson

#449ATP

$55kYTD

$63kCAREER

23 yrs

Last 10

WWLWLLWWWW

Boyer T.

Johnson S.

Tristan Boyer faces Spencer Johnson in the San Diego 2 round of 32 on hard. Tristan Boyer is the paper favourite — ranked #208 — but Spencer Johnson arrives in form, winning 7 of their last 10 on hard to Tristan Boyer's 4.

Win Probability

Pre-match · updated 10:50 UTC

Boyer T.67%

Johnson S.33%

Toss-up
50–58%

Slight edge
58–67%

Clear favourite
67–80%

Strong favourite
80%+

Slight edge · Boyer T. narrowly ahead

Calibrated model · 63% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.

Key context

Freshness: Tristan Boyer comes in with 6 days of rest and 38 games in 14d, vs Spencer Johnson's 1 and 93.
Last match: Spencer Johnson dropped just 6 games past J. Vrba.
Surface form: Tristan Boyer 4 of 10, Spencer Johnson 7 of 10 on hard recently — Spencer Johnson the sharper of late.

Common opponents

Last 12 months

No common opponents in the last 12 months.

Includes tour-level, 125s, qualifying and team events (⚑). Walkovers excluded. Describes past results in different contexts — not a prediction.

Umpiry Score

Pre-match

Boyer T.

5.7

Slight disadvantageUmpiry ScorePartial · surface data limited

Johnson S.

5.4

Clear underdogUmpiry ScorePartial · surface data limited

Back-to-back day (−0.5)

Form & Matchup

5.0No prior meetings

H2H

5.0No prior meetings

3.54 of last 10 on hard

Surface form

6.87 of last 10 on hard

0.0

Win streak

Fatigue & Travel

3-set count

7.01 three-setter in 14 days

5.0Won 50% in USA (20)

Country comfort

6.8Won 79% in USA (58)

Context

5.0Didn't play here last year

Defending pts

5.0Didn't play here last year

The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.

17 vs 7 matches

Statistics

This season

Boyer T.Johnson S.

1st serve in·Even

66%

68%

1st serve points won·Even

71%

2nd serve points won·Slight edge

48%

59%

Service points won·Even

63%

67%

Return points won·Even

39%

38%

Break points saved·Slight edge

62%

68%

Aces / match·Dominant

5.8

9.1

Double faults / match·Clear edge

2.8

2.0

Averages over each player's completed matches in the selected window (17 vs 7). ATP, WTA & Challenger.

Serve vs return

This season

Boyer T.serving82% hold

wins 64% of points on serve vs Johnson S.

Johnson S.serving85% hold

wins 66% of points on serve vs Boyer T.

Even serve battle

Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About

Freshness

Recent load

Boyer T.Johnson S.

Freshness·Clear edge

Boyer T.: 6 days rest · 1 match, 20 games (7d) · Johnson S.: 1 day rest · 2 matches, 40 games (7d). Higher means fresher. About

Conditions

Weather forecast

27°CDrizzle

Wind 5 km/hHumidity 82%

Head to head

No previous meetings on record.

Tristan Boyer vs Spencer Johnson — San Diego 2 Round of 32