Gabriel Diallo and Dominik Koepfer will clash against each other in the semifinal of the Calgary Challenger for the 1st time in their career. They are scheduled to play on Saturday at 1:30 pm on NATIONAL BANK COURT. In this post, we analyze their head to head performance and prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Dominik Koepfer who should win in 3 sets.

As per the initial odds, Dominik Koepfer is the pick to win this match.
Dominik Koepfer -> 1.58
Gabriel Diallo -> 2.32

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Prediction and head to head Gabriel Diallo vs. Dominik Koepfer

There is no head to head record between Gabriel Diallo and Dominik Koepfer since this will be the first time that they will fight against each other in the main tour.

Gabriel Diallo

Gabriel Diallo

0 - 0win/loss

Rank
41
High
33
LWLLWLWWLW
See allSTATS
Year Total Hard Clay I.hard Grass Carpet
2025 37-29 16-15 8-7 4-4 9-3 0-0
2024 49-26 30-12 7-6 9-4 3-4 0-0
2023 39-28 8-11 2-2 24-10 5-5 0-0
2022 23-10 17-6 0-0 6-4 0-0 0-0
2021 12-4 8-3 0-0 4-1 0-0 0-0
See all years

Ranked no. 248 (career-high), Diallo reached the semifinal after defeating Julian Ocleppo 7-62 6-4, Juan Pablo Ficovich 6-3 6-2 and Antoine Escoffier 6-3 5-7 7-5.

In the quarter, Diallo defeated Escoffier (6-3 5-7 7-5). During the match, Diallo scored 103 points vs Escoffier’s 102. The Canadian was quite aggressive to blast 48 winners.

Talking about the service games, Diallo recorded 6 aces and he committed only 5 double faults. Gabriel Diallo lost the serve 4 times and he saved 6 break points. Furthermore, Diallo put 63% of his first serves in, winning 67% (48/72) of the points behind his 1st serve and 47% (20/43) on the 2nd serve. The Canadian broke Escoffier 5 times after converting 63% of his break points (5/8).

Overall Performance in this tournament

Gabriel has surrendered 1 set in this competition to win 54% of the points he played.

Diallo has a solid record in the last 4 years having won 69% of his matches (44-20). 5-2 on indoor hard courts in 2022. In connection with his performance on the same surface of this tournament, Diallo has a composed12-7 record in the last 4 years on indoor hard courts.

Diallo’s best result of the season was reaching the final in M25 East Lansing,the Granby Challenger and the Fairfield Challenger.

The Canadian has a compiled 22-8 win-loss record in 2022, 5-2 on indoor hard courts (See FULL STATS).

Previously in the Calgary Challenger

Calgary Challenger
Diallo's Record

Dominik Koepfer

Dominik Koepfer

0 - 0win/loss

Rank
509
High
49
LWWLWLWLLW
See allSTATS
Year Total Hard Clay I.hard Grass Carpet
2025 7-6 6-4 0-0 1-2 0-0 0-0
2024 21-19 10-6 6-9 3-2 2-2 0-0
2023 40-19 7-6 24-5 6-6 3-2 0-0
2022 19-14 12-9 0-0 7-2 0-3 0-0
2021 27-30 10-12 10-9 5-6 2-3 0-0
See all years

Ranked no. 259, Dominik reached the semifinal after defeating Nick Chappell 6-2 7-64, Cleeve Harper 6-4 6-1 and Harold Mayot 7-60 3-6 6-3.

In the quarter, Dominik defeated Mayot (7-60 3-6 6-3). During the match Koepfer scored 104 points vs Mayot’s 90. Dominik was exceptionally aggressive to blast 43 winners.

Talking about serving, Koepfer made 9 aces and he committed only 5 double faults. Overall, Dominik Koepfer was quite effective on serve to win 74% (43/58) of his 1st serve and 52% (22/42) on the second serve. However, this didn’t prevent his to concede the serve 3 times. Koepfer broke Mayot 3 times after converting 50% of his break points (3/6).

Overall Performance in this tournament

Dominik has conceded 1 set in the tournament to win 55% of the points he played.

Koepfer’s best result of the season was getting to the final in the Cary Challenger.

The German has a compiled 17-14 win-loss record in 2022, 5-2 on indoor hard courts (See FULL STATS).

Calgary Challenger
Koepfer's Record

H2H Performance in the tournament (main draw)

G.Diallo
D.Koepfer
5h:06
5h:06
Time on court​
4h:41
4h:41
!
2h:20
2h:20
Last match​
1h:56
1h:56
3
3
Match played
3
3
73
73
Games Played​
69
69
7
7
Set played​​
7
7
248
248
Total points​
252
252
82.7
82.7
Avg point​
84
84
118
118
Winners
102
102
39.3
39.3
Avg Winners​
34
34
48%
48%
Ratio winners
40%
40%
-- Serve --
31
31
Aces
17
17
!
10.3
10.3
Avg Aces
5.7
5.7
11
11
Double Faults
16
16
3.7
3.7
Avg Double Faults
!
5.3
5.3
118/154
118/154
1st won total​
102/135
102/135
!
77%
77%
1st won %
!
76%
76%
46/93
46/93
2nd won total​
41/85
41/85
49%
49%
2nd won %
48%
48%
-- Break Points --
9/14
9/14
BP won
12/26
12/26
3/4.7
3/4.7
Avg BP won
4/8.7
4/8.7
!
64%
64%
Won
46%
46%
23
23
Conceded
20
20
7.7
7.7
Avg Conceded
6.7
6.7
4
4
Broken
6
6
1.3
1.3
Avg Broken
2
2
19
19
Saved
14
14
See Allstats

Matches, sets, games and points

Points Diallo Koepfer
Match played 3 3
Tot Set 7 7
Tot Games 73 69
Pts 248-215 252-204
Total Points 463 456
Winners 118 102
%Winners 48% 40%

Both Diallo and Koepfer played 3 matches. Both players lost a set in the event. Gabriel Diallo lost 1 set, while Dominik Koepfer dropped 1 set. Talking about their workload, Diallo and Koepfer have played the same amount of sets 7. However, Diallo played 4 games more than Koepfer. Gabriel scored 118 winners (48% of the total points). On the other side, Dominik scored 102 winners (40%).

Serve Performance

Serve Diallo Koepfer
Aces 31 17
Avg per match 10.3 5.7
1st in 154/247 135/220
%1st in 62% 61%
1st pts 118/154 102/135
%1st pts 77% 76%
2nd pts 46/93 41/85
%2nd pts 49% 48%

Diallo blasted 31 aces (10.3 per match). Koepfer recorded 17 aces (5.7 per match). Diallo won 77% points on his first serve. He quite strong on his second serve to win 49% of the points. On the other side, Koepfer won 76% of the points behind his first serve. He had a solid display on his second serve to win 48% of the points.

How they played the important points

Breaks Diallo Koepfer
Won 9 12
Converted 9/14 12/26
% Converted 64% 46%
Conceded 23 20
Saved 19 14
% Saved 83% 70%
Times Broken 4 6

Gabriel broke his opponents 9 times with a 64% conversion rate. The Canadian conceded his serve 4 times and he saved 83% of the break points that he conceded. The German broke his opponents 12 times with a 46% conversion rate. The German conceded his serve 6 times and he saved 70% of the break points that he conceded.

Diallo
R1
Ocleppo		 R2
Pablo Ficovich		 1/4
Escoffier		 Total
Score 7-62 6-4 6-3 6-2 6-3 5-7 7-5
Tot Set 2 2 3 7
Tot Games 23 17 33 73
pts 77-64 68-49 103-102 248-215
Total points 141 117 205 463
Winners 38 32 48 118
%Winners 49% 47% 47% 48%
SERVE
Aces 14 11 6 31
Double Faults 3 3 5 11
1st in 42/68 40/64 72/115 154/247
% 1st in 62% 63% 63% 62%
1st pts 38/42 32/40 48/72 118/154
% 1st pts 90% 80% 67% 77%
2nd pts 15/26 11/24 20/43 46/93
% 2nd pts 58% 46% 47% 49%
Breaks
Won 1 3 5 9
Converted 1/2 3/4 5/8 9/14
Converted % 50% 75% 63% 64%
Conceded 5 8 10 23
Saved 5/5 8/8 6/10 19
Saved % 100% 100% 60% 87%
Times Broken 0 0 4 4
Koepfer
R1
Chappell		 R2
Harper		 1/4
Mayot		 Total
Score 6-2 7-64 6-4 6-1 7-60 3-6 6-3
Tot Set 2 2 3 7
Tot Games 21 17 31 69
pts 78-64 70-50 104-90 252-204
Total points 142 120 194 456
Winners 37 22 43 102
%Winners 47% 31% 41% 40%
SERVE
Aces 4 4 9 17
Double Faults 8 3 5 16
1st in 48/70 29/50 58/100 135/220
% 1st in 69% 58% 58% 61%
1st pts 37/48 22/29 43/58 102/135
% 1st pts 77% 76% 74% 76%
2nd pts 9/22 10/21 22/42 41/85
% 2nd pts 41% 48% 52% 48%
Breaks
Won 3 6 3 12
Converted 3/9 6/11 3/6 12/26
Converted % 33% 55% 50% 46%
Conceded 2 7 11 20
Saved 1/2 5/7 8/11 14
Saved % 50% 71% 73% 65%
Times Broken 1 2 3 6

Tennis Scores in Calgary Challenger

Upcoming matches in the draw

Diallo
More Stats
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Koepfer

Click for FULL STATS