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Zak O'Brien
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Zak O'Brien
(66333888212)
Singles
8.38
Doubles
8.52
Favorite
Overview
Tournaments
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2025
2024
2023
2019
2017
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2025 O3k Tennyson Classic
Tennis Queensland | Brisbane
29/09/2025
to
2/10/2025
Open
Open
Event: MS CS - Tier 2
Singles Main Draw
Round of 32
1h 36m
Kangmin Lee
Zak O'Brien
L
6
2
6
3
H2H
2025 O3k Hervey Bay Open
Hervey Bay & District Tennis Assoc | Hervey Bay
26/09/2025
to
28/09/2025
Open
Open
Event: MD OS
Doubles Main Draw
Consolation quarter final
Bye
Zak O'Brien
Chris Turner
W
Consolation semi final
Zak O'Brien
Chris Turner
W
Athan Bekos
Jayden Tzirtis
Walkover
H2H
Consolation final
1h 10m
Zak O'Brien
Chris Turner
L
Jesper Andersson
Joshua Lo
1
6
2
6
H2H
Round of 16
1h 55m
Zak O'Brien
Chris Turner
W
Aru Takahashi
Carter Watson
6
4
6
7
10
7
H2H
Quarter final
51m
Zak O'Brien
Chris Turner
L
Arkin Amin-Patel
Sebastian Huggins
3
6
2
6
H2H
Event: MS OS
Singles Main Draw
Round of 32
1h 08m
Zak O'Brien
L
Scout Buckley
1
6
1
6
H2H
17th/32nd place
Zak O'Brien
W
Bye
17th/24th place
1h 26m
Sam Ryan
Zak O'Brien
L
6
2
6
2
H2H
21st/24th place
Zak O'Brien
W
Bye
21st/22nd place
1h 29m
Oscar Miller
Zak O'Brien
W
2
6
2
6
H2H
2025 O3k Samford Tennis Club Open
Samford Tennis Club | Brisbane
23/08/2025
to
25/08/2025
Open
Open
Event: MD OS
Doubles Main Draw
Round of 32
1h 10m
Kishan Reddy
Sam Ryan
Samuel Murree
Zak O'Brien
W
3
6
1
6
H2H
Round of 16
1h 23m
Blaise Allan
David Kym
Samuel Murree
Zak O'Brien
L
6
2
6
4
H2H
Event: MS OS - TIER 2
MS OS - TIER 2
Round of 32
1h 40m
Hunter Takac
Zak O'Brien
W
6
7
6
4
5
10
H2H
Round of 16
1h 25m
Gus Mcdonald
Zak O'Brien
W
6
2
1
6
3
10
H2H
Quarter final
1h 17m
Nicholas Scott
Zak O'Brien
L
6
1
6
2
H2H
2025 O3k Mooloolaba Open
Mooloolaba Tennis Club | Mooloolaba
16/08/2025
to
18/08/2025
Open
Open
Event: MS OS - Tier 2
Singles Main Draw
Round of 32
Bye
Zak O'Brien
W
Round of 16
1h 18m
Maksymilian Cooney
Zak O'Brien
W
4
6
3
6
H2H
Quarter final
1h 25m
Stephen Muir
Zak O'Brien
W
5
7
4
6
H2H
Semi final
1h 37m
Harry Johnson
Zak O'Brien
W
0
6
6
7
H2H
Final
1h 19m
Kishan Reddy
Zak O'Brien
W
2
6
6
0
6
10
H2H
2025 25k Queensland Open State Championships
Tennis Queensland | Brisbane
28/06/2025
to
2/07/2025
Open
Open
Event: MD OS - Tier 2
MD OS - Tier 2
Round of 32
52m
Ben BINGHAM
Jason TRAN
Samuel HOOGERVORST
Zak O'BRIEN
W
1
6
1
6
H2H
Round of 16
1h 04m
Samuel HOOGERVORST
Zak O'BRIEN
L
Justin Li MORONEY
Ethan PRYOR
3
5
2
4
H2H
Event: MS CONSO GROUP F
MS CONSO GROUP F
Quarter final
51m
Sean CHASELING
Zak O'BRIEN
L
4
1
4
1
H2H
Event: MS OS - Tier 5
MS OS - Tier 5
Round of 32
1h 46m
Zak O'BRIEN
L
Daniel ABAR
2
6
4
6
H2H
2025 20k Elite Tennis International Open Championships
Sunshine Coast Regional Tennis Centre – Caloundra | Caloundra
23/06/2025
to
27/06/2025
Open
Open
Event: MS SS Tier 4
MS SS Tier 4
Round of 32
1h 26m
Alex Baker
Zak O'Brien
W
3
6
1
6
H2H
Round of 16
1h 33m
Zak O'Brien
L
Joshua Busa
3
6
4
6
H2H
2025 O3k KDV Sport Hardcourt Open
KDV Sport | Gold Coast
24/05/2025
to
27/05/2025
Open
Open
Event: MS OS - TIER 2
MS OS - TIER 2
Round of 32
1h 20m
Zak O'Brien
W
Jake Thomas
6
3
6
2
H2H
Round of 16
1h 32m
Zak O'Brien
L
Anson Chee
2
6
4
6
H2H
2025 O5k J250 J125 CBC Green Ashley Cooper Open Age Championships
Tennis Queensland | Brisbane
14/04/2025
to
20/04/2025
Open/Junior
Junior
Open
Event: MD OS - Tier 1
Doubles Main Draw
Round of 32
34m
Zac CREENAUNE
Cameron MIDDLETON
Juanu JONCK
Zak O'BRIEN
L
6
3
6
1
H2H
Event: MS CONSO - Tier 3
MS CONSO - Tier 3
Round of 16
1h 42m
Jasper TAM
Zak O'BRIEN
W
5
7
6
1
9
11
H2H
Quarter final
2h 02m
Zak O'BRIEN
W
Eli PAGE
4
6
6
3
13
11
H2H
Semi final
1h 37m
Fintan MOLBALEH
Zak O'BRIEN
L
6
4
3
6
10
5
H2H
Event: MS OS - Tier 3
MS OS - Tier 3
Round of 32
05m
Zak O'BRIEN
L
Kris BAILEY
6
7
4
6
H2H
2025 O3k Beenleigh Open
Beenleigh Tennis Centre | Beenleigh
5/04/2025
to
8/04/2025
Open
Open
Event: MConso
MConso
Round 2
1h 04m
Billy BOUGOURE
Zak O'BRIEN
L
6
0
6
3
H2H
Round 1
1h 31m
Giorgio AQUINO
Zak O'BRIEN
W
4
6
5
7
H2H
Event: MD OS - Tier 2
MD OS - Tier 2
Round of 16
1h 48m
Tim FITZGERALD
Zak O'BRIEN
L
Troy GOODWIN
Jack HART
0
6
7
5
10
12
H2H
Event: MS OS - Tier 3
MS OS - Tier 3
Round of 32
1h 36m
Zak O'BRIEN
L
Joshua BUSA
4
6
0
6
H2H
2025 O3k Elite Tennis International Sunshine Coast Open Championships
Sunshine Coast Regional Tennis Centre – Caloundra | Sunshine Coast
28/02/2025
to
2/03/2025
Open
Open
Event: MS OS TIER 3
MS OS TIER 3
Round of 32
1h 34m
Zak O'Brien
L
Mitchell Rodgers
3
6
6
3
5
10
H2H
2025 O3k Samford Open Championships
Samford Tennis Club | Brisbane
8/02/2025
to
10/02/2025
Open
Open
Event: MS CS - TIER 3
MS CS - TIER 3
Round of 32
1h 42m
Joshua Russo
Zak O'Brien
W
4
6
4
6
H2H
Round of 16
1h 21m
Zak O'Brien
W
Luke Neophytou
6
2
6
4
H2H
Quarter final
1h 47m
Lennox Boles
Zak O'Brien
W
4
6
6
1
9
11
H2H
Semi final
1h 37m
Zak O'Brien
W
Mitchell Rodgers
4
6
6
2
10
6
H2H
Final
1h 13m
Zak O'Brien
L
Keizo Yoshii
3
6
1
6
H2H
2025 20k Churchie Open
David Turbayne Tennis Centre | Brisbane
21/01/2025
to
25/01/2025
Open
Open
Event: MS CS - TIER 3
MS CS - TIER 3
Round of 32
1h 37m
Zak O'BRIEN
W
Yago ORTEGA QUINTANA
7
6
6
2
H2H
Round of 16
2h 42m
Zak O'BRIEN
L
Andre MARGAHI
4
6
5
7
H2H
2025 O2.1k Bayside Open (Singles Only)
Redlands Tennis Academy | Brisbane
11/01/2025
to
13/01/2025
Open
Open
Event: MS OS
Singles Main Draw
Round of 32
1h 55m
Oliver Iselin-Shea
Zak O'Brien
L
6
2
6
7
13
11
H2H
2025 05k J125 Ballina New Years Open
Ballina Tennis Club | Ballina
3/01/2025
to
6/01/2025
Junior
Junior
Open
Event: B Grade Mens Doubles
B Grade Mens Doubles
Round of 32
Yali AMIT
Zak O'BRIEN
W
Bye
Round of 16
1h 06m
Yali AMIT
Zak O'BRIEN
L
Troy DAVIES
Lachlan PIGOTT
3
6
3
6
H2H
Event: B Grade Mens Singles
B Grade Mens Singles
Round of 64
Zak O'BRIEN
W
Bye
Round of 32
1h 53m
Zak O'BRIEN
W
Lachlan PIGOTT
6
1
5
7
10
5
H2H
Round of 16
1h 52m
Zak O'BRIEN
W
Max BEAR
7
5
6
4
H2H
Quarter final
1h 41m
Zak O'BRIEN
L
Frank SCHULTHEISS
5
7
6
7
H2H
Event: 16 Boys Conso
16 Boys Conso
Semi final
Zak O'BRIEN
Walkover
L
Harry BECK
H2H
Event: BS U16 JS
Singles Main Draw
Round of 16
1h 36m
Anson CHEE
Zak O'BRIEN
L
6
3
7
5
H2H
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