Centre Court
Surface: Clay
Kalender A / Serdarusic N
McDonald N / Opitz J
80
%
wins
- 8 wins
- 2 losses
10
last matches
- 6 wins
- 3 losses
66
%
wins
Tournament
Match
1
2
3
Result
W
14.08.2026
ATP Challenger Hamburg, Germany Men Doubles
Kalender A / Serdarusic N
Martos Gornes S / Walkow S
6
3
6
2
–
–
2
0
W
13.08.2026
ATP Challenger Hamburg, Germany Men Doubles
Merino A / Zhu Michael
Kalender A / Serdarusic N
3
6
3
6
–
–
0
2
W
12.08.2026
ATP Challenger Hamburg, Germany Men Doubles
Bass F / Jans J
Kalender A / Serdarusic N
4
6
7
6
4
10
1
2
W
08.08.2026
ATP Challenger Hagen, Germany Men Doubles
Bass F / Jans J
Kalender A / Serdarusic N
4
6
6
3
11
13
1
2
W
07.08.2026
ATP Challenger Hagen, Germany Men Doubles
Kalender A / Serdarusic N
Kolar Z / Vocel M
6
4
4
6
10
7
2
1
W
06.08.2026
ATP Challenger Hagen, Germany Men Doubles
Kalender A / Serdarusic N
Loof T / Uesugi K
7
6
6
4
–
–
2
0
W
05.08.2026
ATP Challenger Hagen, Germany Men Doubles
Kalender A / Serdarusic N
Ruehl T / Veldheer M
7
6
7
6
–
–
2
0
L
29.07.2026
ATP Challenger Bonn, Germany Men Doubles
Kalender A / Serdarusic N
Bianchi J J / Pujol Navarro B
6
7
3
6
–
–
0
2
L
16.07.2026
ATP Umag, Croatia Men Doubles
Stevenson D / Willis M
Kalender A / Serdarusic N
7
6
2
6
10
5
2
1
W
15.07.2026
ATP Umag, Croatia Men Doubles
Kalender A / Serdarusic N
Frantzen C / Haase R
6
3
7
6
–
–
2
0
Tournament
Match
1
2
3
Result
W
14.08.2026
ATP Challenger Hamburg, Germany Men Doubles
Ruehl T / Veldheer M
McDonald N / Opitz J
6
7
6
7
–
–
0
2
W
13.08.2026
ATP Challenger Hamburg, Germany Men Doubles
McDonald N / Opitz J
Jecan M A / Pavel B
6
3
7
5
–
–
2
0
W
11.08.2026
ATP Challenger Hamburg, Germany Men Doubles
McDonald N / Opitz J
Moeller M / Petkovic M
7
5
6
3
–
–
2
0
L
08.07.2026
ATP Challenger Braunschweig, Germany Men Doubles
Gonzalez S / Hidalgo D
McDonald N / Opitz J
6
3
6
0
–
–
2
0
L
05.02.2026
ATP Challenger Koblenz, Germany Men Doubles
Ruehl T / Zahraj P
McDonald N / Opitz J
2
6
6
4
12
10
2
1
W
03.02.2026
ATP Challenger Koblenz, Germany Men Doubles
McDonald N / Opitz J
Catry R / Massard L
6
4
1
6
10
2
2
1
L
24.10.2025
ATP Challenger Hamburg, Germany Men Doubles
McDonald N / Opitz J
Karol M / Niklas-Salminen P
2
6
7
6
8
10
1
2
W
23.10.2025
ATP Challenger Hamburg, Germany Men Doubles
McDonald N / Opitz J
Latinovic S / Walkow S
6
3
7
6
–
–
2
0
W
20.10.2025
ATP Challenger Hamburg, Germany Men Doubles
McDonald N / Opitz J
Damas M / Moro Canas A
7
5
6
3
–
–
2
0
Kalender A / Serdarusic N
McDonald N / Opitz J
All tournaments
9
Matches
All tournaments
55
Aces
32
12
Double faults
21
267
Points scored on first serve
268
134
Points scored on second serve
76
13
Scored break points
27
584
Total won points
567
103
Total games won
95
6
Scored tiebreaks
5
Admir Kalender
Country:
Croatia
Rating:
ATP: 182
(Max: 178)
Leading hand:
-
Age:
25 years
Height / weight:
n/a
Statistics by coverage
Hard:
33.3%
(1-2)
Clay:
60%
(21-14)
McDonald N
Country:
Germany
Rating:
n/a
Leading hand:
Right
Age:
18 years
Height / weight:
n/a
Statistics by coverage
Hard:
60%
(3-2)
Clay:
62.5%
(5-3)
Main draw
Main draw
Date
Match
Result
15.08.2026 12:00
Kalender A / Serdarusic N
McDonald N / Opitz J
–
–