Stefan Kozlov vs Collin Altamirano Head-to-Head Stats, Results & Performance Comparison

Wojtek Kolan

Our Predictions

H2H Records Career Stats

HEAD TO HEAD
S. Kozlov vs C. Altamirano

Stefan Kozlov

USA

2

Win

Played

0

Win

Age

6'0" (183 cm)

Height

6'2" (188 cm)

292

C. Rank

899

103

Best Rank

267

Total Titles

YTD Titles

$372.0K

Career Money

$67.4K

Right-Handed

Plays

Right-Handed

Collin Altamirano

USA

2

Win

Played

0

Win

Age

6'0" (183 cm)

Height

6'2" (188 cm)

292

C. Rank

899

103

Best Rank

267

Total Titles

YTD Titles

$372.0K

Career Money

$67.4K

Right-Handed

Plays

Right-Handed

Head-to-head: Kozlov 2 - 0 Altamirano

They have played 4 sets in total, with Stefan Kozlov winning 4 and Collin Altamirano winning 0. The last match between Stefan Kozlov and Collin Altamirano was at the Lincoln Challenger, 04-08-2024, Round: Q1, Surface: Hard, with Stefan Kozlov getting the victory 6-4 7-6(4).

Players	Head To Head Match Wins
Kozlov	2
Altamirano	0

Last 2 H2H Matches:

(Q1) Lincoln Challenger(08-04-24)

Stats

Stefan Kozlov

Collin Altamirano

(R1) Charlottesville Challenger(11-03-15)

Stats

Stefan Kozlov

Collin Altamirano

S. Kozlov vs C. Altamirano H2H Profile

S. Kozlov	Stats	C. Altamirano
$371,951	Career Prize Money	$67,351
57.10% (346-260)	Career Total W/L	56.03% (223-175)
1	Hard	0
1	Indoor	0
11	Titles	3
2	Total H2H Matches	0
0% (0-0)	YTD Win/Loss	0% (0-0)

S. Kozlov vs C. Altamirano Match Preview:

Second serve performance recent form: In recent form (last 6 months), Stefan Kozlov has won 45.86% of points on their second serve, while Collin Altamirano has won 0%. There is a high correlation between this stat and match prediction accuracy.
Return game stats recent form: Return stats show Stefan Kozlov, in recent form, has won 46.39% of their opponent's second serve points, while Collin Altamirano has won 0%. The same stats for first serve returns are 29.81% and 0% respectively and this has a high correlation to pick who is favored in this H2H matchup.
Under pressure analysis: Stefan Kozlov has saved 53.90% of breakpoints in recent form, whereas Collin Altamirano has saved 0% which is a useful statistic for in-game betting predictions.
Performance overview: Over the last year Stefan Kozlov has won 70.00% of matches played (W/L 28/12), with Collin Altamirano winning 61.54% (W/L 8/5) that gives us an overall head-to head prediction overview.
Best surface: Stefan Kozlov has their best career surface win % on I.hard, winning 64% (W/L 86/48), and worse career win % on Grass, winning 38% (W/L 15/24). Collin Altamirano has their best career surface win % on Hard, winning 64% (W/L 152/104), and worse career win % on I.hard, winning 28% (W/L 7/18).
Player level: In the last year, Stefan Kozlov has played most of their matches on the Challengers/ITF tournaments > $10K, winning 68.75% of matches (W/L 22/10), where as Collin Altamirano has played most of their matches on the Futures/Satellites/ITF tournaments $10K, winning 61.54% of matches (W/L 8/5). When comparing stats between players to predict the favorite, it is of course all relative to the event level they have been playing at.
Direct H2H matches: They have played 2 times before with Stefan Kozlov winning 2 times and Collin Altamirano being victorious 0 times. They have played 4 sets in total, with Stefan Kozlov winning 4 and Collin Altamirano winning 0.
The last match between Stefan Kozlov and Collin Altamirano was at the Lincoln Challenger, 04-08-2024, Round: Q1, Surface: Hard, with Stefan Kozlov getting the victory 6-4 7-6(4).
Head to head match duration: In past head to head matches, the average match time between these players has been 1:34:14.
Opponent quality stats: Over the last 12 months, Stefan Kozlov has played against opponents with an average rank of 408.18 while Collin Altamirano has played against players with an average rank of 336.
Deciding set performance vs all players: If you are interested in live predictions and betting, if this match goes into a deciding set, Stefan Kozlov has won 65% of deciding sets over the last 12 months, while Collin Altamirano has won 50% in all matches played on tour.
Break point conversion: In recent form, Stefan Kozlov has converted 44.93% of breakpoint opportunities, and Collin Altamirano has converted 0% of their chances to break their opponents serve. A telling stat for in-game live betting tips when either player has a breakpoint opportunity.

Stefan Kozlov vs Collin Altamirano Editorial Preview By TennisTipster88.

S. Kozlov vs C. Altamirano H2H Stats Used In Our Predictions

S. Kozlov	Stats	C. Altamirano
2	H2H Matches Won	0
4	Sets Won	0
25	Games Won	13
7	Aces (Total)	8
3	Total Double Faults	3
1:34:14	Average Match Time	1:34:14
71% (82/116)	1st Serve %	55% (67/121)
67% (55/82)	1st Serve Win %	52% (35/67)
44% (15/34)	2nd Serve Win %	35% (19/54)
59% (10/17)	Break Pts Won %	83% (5/6)
55% (67/121)	Return Points Win %	40% (46/116)
100% (2/2)	Best‑of‑3 Win %	0% (0/2)
100% (2/2)	1st Set Won, Won Match	0% (0/0)
0% (0/2)	1st Set Won, Lost Match	0% (0/0)
0% (0/0)	1st Set Lost, Won Match	0% (0/2)

Recent Performance Stats

S. Kozlov Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Bogota Challenger - 24-11-2025
QF Juan Sebastian GomezJ. Sebastian	L	4-6 6-4 7-5	Stats
R2 David Jorda SanchisD. Jorda	W	6-4 6-4	Stats
R1 Juan Bautista TorresJ. Bautista	W	6-0 4-6 6-3	Stats
Champaign Challenger - 10-11-2025
F Murphy CassoneM. Cassone	W	7-6(3) 7-5	Stats
SF Cedrik-Marcel StebeC. Stebe	W	6-0 4-0 ret.	Stats

View All

C. Altamirano Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
M25 Burnie - 17-02-2025
Q1 Sam Young-MathersS. Young-Mathers	L	7-6(2) ret.	Stats
M25 Timaru - 10-02-2025
R1 Naoki NakagawaN. Nakagawa	L	6-4 6-4	Stats
M15 Manacor - 20-01-2025
R1 Ivan IvanovI. Ivanov	L	6-3 6-4	Stats
Q3 Vladimir BazilevskiyV. Bazilevskiy	W	6-3 6-4	Stats
Q2 Rafael GiotisR. Giotis	W	6-1 6-2	Stats

View All

S. Kozlov vs C. Altamirano Stats Breakdown Vs All H2H Opponents

S. Kozlov	Stats	C. Altamirano
57.10% (346/260)	YTD Win/Loss	56.03% (223/175)
54.30% (776/653)	Sets Win/Loss	55.71% (507/403)
51.63% (6862/6430)	Games Win/Loss	52.96% (4464/3965)
55.33% (166/134)	Hard Win/Loss	59.38% (152/104)
59.40% (79/54)	Clay Win/Loss	55.17% (64/52)
64.18% (86/48)	Indoor Hard W/L	26.92% (7/19)
38.46% (15/24)	Grass Win/Loss	0% (0/0)
0.22	Aces Per Game	0.26
1458	Aces Total	1069
0.33	Double Faults Per Game	0.16
2125	Total Double Faults	664
1:35:24	Average Match Time	1:9:17
565.57	Average Opponent Rank	520.4
61% (23211/37961)	1st Serve %	58% (10719/18347)
66% (15381/23211)	1st Serve Win %	69% (7353/10719)
48% (7129/14750)	2nd Serve Win %	49% (3717/7628)
42% (1809/4280)	Break Points Won % (Total)	43% (774/1802)
42% (16044/38519)	Return Points Win %	40% (7437/18548)
31.03% (9/20)	Slam W/L	57.14% (4/3)
23.53% (4/13)	Masters W/L	0% (0/0)
38.81% (26/41)	Main Tour W/L	0.00% (0/1)
58.69% (206/145)	Challenger W/L	39.22% (40/62)
71.13% (101/41)	Futures W/L	62.15% (179/109)
57% (338/588)	Best of 3 Sets Win %	57% (222/388)
45% (5/11)	Best of 5 Sets Win %	0% (0/3)
48% (70/146)	Tiebreaks Win % (Total)	46% (46/100)
61% (130/212)	Deciding Set Win %	48% (57/118)
87% (319/278)	1st Set Won, Won Match	85% (225/192)
12% (319/39)	1st Set Won, Lost Match	14% (225/32)
24% (287/68)	1st Set Lost, Won Match	18% (173/31)