Skip to content
Sport
Baseline
Home
Players ▾
Browse
Player finder
Search by name, country or hand
ATP players
All ranked men's players
WTA players
All ranked women's players
Right-handers
Filter by playing hand
Left-handers
The southpaw club
View all players →
By country
Spain
Nadal, Alcaraz & the Spanish school
Serbia
Djokovic's nation
USA
From Sampras to Fritz
Italy
Sinner, Berrettini & the Azzurri
Switzerland
The Federer legacy
Great Britain
Murray's home turf
Poland
Świątek & the new WTA wave
Belarus
Sabalenka, Azarenka
All 200+ countries →
Top players
Novak Djokovic
24-time Grand Slam winner
Rafael Nadal
22-time Grand Slam king of clay
Roger Federer
20-time Grand Slam maestro
Jannik Sinner
ATP world #1
Carlos Alcaraz
Spanish phenom
View all rankings →
Tournaments ▾
Tournaments
All tournaments
18,000+ events since 1968
Grand Slams
The four majors of tennis
ATP Masters 1000
The big nine men's events
WTA Premier / 1000
Top tier women's events
Year-end Finals
ATP Finals & WTA Finals
Davis & BJK Cup
National team competitions
View all tournaments →
The four majors
Australian Open
Hard court · Melbourne, January
Roland Garros
Clay court · Paris, May/June
Wimbledon
Grass court · London, June/July
US Open
Hard court · New York, August
All Grand Slam editions →
Iconic rivalries
Djokovic vs Nadal
Most-played duel in Open Era
Djokovic vs Federer
50+ Slam-finals classics
Nadal vs Federer
Fedal, clay vs grass
Sinner vs Alcaraz
The new ATP rivalry
Świątek vs Sabalenka
Current WTA #1 battle
Head-to-head finder →
Surfaces ▾
Hard court
Hard court overview
Wins, win % & specialists
Australian Open
Plexicushion hard court
US Open
DecoTurf hard court
All hard events
Every hard-court tournament
Hard-court matches →
Clay court
Clay court overview
The dirt-baller specialists
Roland Garros
The clay-court major
All clay events
European & South American clay swing
Clay-court matches →
Grass court
Grass court overview
Fastest surface in tennis
Wimbledon
The grass-court major
All grass events
Pre-Wimbledon warm-ups
Grass-court matches →
Carpet & indoor
Carpet court overview
Historic indoor carpet results
All carpet events
Indoor surface from the 70s, 90s
Year-end Finals
Modern indoor hard-court finale
All surfaces →
Rankings ▾
Live rankings
ATP top 100
Current men's world rankings
WTA top 100
Current women's world rankings
ATP top 10
Men's elite tier
WTA top 10
Women's elite tier
All rankings →
By country
Spanish ATP players
Ranked Spanish men
Italian ATP players
Ranked Italian men
American ATP players
Ranked US men
American WTA players
Ranked US women
All countries →
Career milestones
24-Slam club
Djokovic's record collection
22-Slam tier
Nadal's clay dynasty
20-Slam tier
Federer's all-court mastery
Grand Slam champions
Every major winner since 1968
Year-end finals →
By surface
Hard-court rankings
Best on the most-played surface
Clay-court rankings
The dirt-ball specialists
Grass-court rankings
Lawn-tennis kings & queens
Carpet-court rankings
Historic indoor specialists
All match results →
Tools ▾
Match tools
Recent matches
Latest ATP & WTA results
ATP matches
Men's match results only
WTA matches
Women's match results only
Live scores
Matches currently in play
All matches →
Head-to-head
H2H finder
Compare any two players
Sinner vs Alcaraz
The new ATP rivalry
Djokovic vs Nadal
All-time most-played duel
Świątek vs Sabalenka
Current WTA #1 battle
All H2H combinations →
Discovery
Search
Find players by name
Youngest players
Rising stars under 22
Grand Slam archive
Every major since 1968
All rankings →
Switch sport
▾
Switch to
Football
92,000+ players · 200+ competitions
→
Basketball
10,241 players · 27 leagues
→
Tennis
137,000+ players · 18,000 tournaments
Current
NFL
25,039 players · 32 teams since 1920
→
→
ATP
·
FRA
·
Plays left-handed
Constantin Bittoun Kouzmine
Age
27
Born
Jan 4, 1999
Height
178 cm
Career high
#462
Current ranking
#563
70 pts · May 4, 2026
Career record
0 - 0
0% of 0 matches
At a glance
ATP rankings
Season by season
W - L · titles
No matches in the database
Record by surface
Career
Surface
W
L
Win %
No matches in the database
Head-to-head tool
