Calvin Hemery and Mert Naci Turker will square off in the 2^nd round of the Istanbul Challenger for the 1^st time in their career. They are scheduled to compete on Thursday at 12:00 pm on CENTER COURT. Here the head to head stats and relative prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Calvin Hemery who should win in 2 sets.

As per the initial odds, Calvin Hemery is the pick to win this match.
Calvin Hemery -> 1.174
Mert Naci Turker -> 4.5

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Prediction and head to head Calvin Hemery vs. Mert Naci Turker

There is no head to head record between Calvin Hemery and Mert Naci Turker since this will be the first time that they will fight against each other in the main tour.

Calvin Hemery

Ranked no. 185, Hemery got to the 2^nd round after beating Peter Makk 6-4 6-4.

In the 1^st round, The French player had a good straight sets win against Makk (6-4 6-4). During the match, Hemery scored 70 points vs Makk’s 59. Hemery was extremely aggressive to blast 33 winners.

Talking about the service games, Hemery recorded 7 aces and he committed only 3 double faults. Calvin Hemery was quite effective on serve to win 79% (33/42) of his 1st serve and 57% (12/21) on the second serve. This was the main reason for not conceding a single break during the match. Hemery broke Makk twice after converting 29% of his break points (2/7).

Hemery has positive win-loss record in the last 10 years having won 58% of his matches (320-232). 2-5 on hard in 2025. Regarding his performance on the same surface of this tournament, Hemery has a compiled 79-55 win-loss record in the last years on hard.

Calvin’s best result of the current season was reaching the final in the Brazzaville Challenger and the Troyes Challenger.

Hemery has a composed 26-26 win-loss record in 2025, 2-5 on hard (See FULL STATS).

Previously in the Istanbul Challenger

Mert Naci Turker

Ranked no. 853, the Turk got to the 2^nd round after defeating Kaya Arinc 7-6(3) 6-2.

In the 1^st round, The Turk had a good straight sets win against Arinc (7-6³ 6-2). During the match Naci Turker scored 83 points vs Arinc’s 66. Naci Turker was extremely aggressive to blast 26 winners.

Talking about serving, Naci Turker scored 3 aces and he committed only 2 double faults. Mert Naci Turker lost the serve 4 times and he saved 1 break points. Furthermore, Naci Turker put 61% of his first serves in, winning 63% (26/41) of the points behind his 1st serve and 46% (12/26) on the 2nd serve. Naci Turker broke Arinc 6 times after converting 46% of his break points (6/13).

Naci Turker’s best result of the current season was getting to the semifinal in M15 Antalya and M15 Kayseri.

Mert has an overall 19-17 win-loss record in 2025, 7-7 on hard (See FULL STATS).

H2H Performance in the tournament

Matches, sets, games and points

Points	Hemery	Naci Turker
Match played	1	1
Tot Set	2	2
Tot Games	20	21
Pts	70-59	83-66
Total Points	129	149
Winners	33	26
%Winners	47%	31%

Both Hemery and Naci Turker played 1 match. Both players have not lost a single set in this event so far. Talking about their workload, Hemery and Naci Turker have played the same amount of sets 2. However, Hemery played 1 game less than Naci Turker. Calvin scored 33 winners (47% of the total points). On the other side, Mert blasted 26 winners (31%).

Serve Performance

Serve	Hemery	Naci Turker
Aces	7	3
Avg per match	7	3
1st in	42/63	41/67
%1st in	67%	61%
1st pts	33/42	26/41
%1st pts	79%	63%
2nd pts	12/21	12/26
%2nd pts	57%	46%

Hemery scored 7 aces . Naci Turker struck 3 aces . Hemery won 79% points behind his first serve. He very solid his second serve to win 57% of the points. On the other side, Naci Turker won 63% of the points on his first serve. He had a solid display on his second serve to win 46% of the points.

How they played the important points

Breaks	Hemery	Naci Turker
Won	2	6
Converted	2/7	6/13
% Converted	29%	46%
Conceded	4	5
Saved	4	1
% Saved	100%	20%
Times Broken	0	4

The French player broke his opponent twice with a 29% conversion rate. Hemery was rock solid on his serve as he has never surrendered a single service game after saving 4 break points. The Turk broke his opponent 6 times with a 46% conversion rate. The Turk conceded his serve 4 times and he saved 20% of the break points that he conceded.

Hemery
	R1 Makk	Total
Score	6-4 6-4
Tot Set	2	2
Tot Games	20	20
pts	70-59	70-59
Total points	129	129
Winners	33	33
%Winners	47%	47%
SERVE
Aces	7	7
Double Faults	3	3
1st in	42/63	42/63
% 1st in	67%	67%
1st pts	33/42	33/42
% 1st pts	79%	79%
2nd pts	12/21	12/21
% 2nd pts	57%	57%
Breaks
Won	2	2
Converted	2/7	2/7
Converted %	29%	29%
Conceded	4	4
Saved	4/4	4
Saved %	100%	100%
Times Broken	0	0

Naci Turker
	R1 Arinc	Total
Score	7-63 6-2
Tot Set	2	2
Tot Games	21	21
pts	83-66	83-66
Total points	149	149
Winners	26	26
%Winners	31%	31%
SERVE
Aces	3	3
Double Faults	2	2
1st in	41/67	41/67
% 1st in	61%	61%
1st pts	26/41	26/41
% 1st pts	63%	63%
2nd pts	12/26	12/26
% 2nd pts	46%	46%
Breaks
Won	6	6
Converted	6/13	6/13
Converted %	46%	46%
Conceded	5	5
Saved	1/5	1
Saved %	20%	20%
Times Broken	4	4

Tennis Scores in Istanbul Challenger

• Milos KarolKarol – Lukas KleinKlein (6-7⁶ 6-2 7-5) – Stats, scores, rankings
• Alex MolcanMolcan – Martin LandaluceLandaluce (6-3 6-4) – Stats, scores, rankings
• Nicolas MejiaMejia – Marek GengelGengel (7-6⁸ 3-6 6-2) – Stats, scores, rankings
• Abedallah ShelbayhShelbayh – Viktor DurasovicDurasovic (6-4 6-0) – Stats, scores, rankings

Upcoming matches in the draw

• Norbert GombosGombos – Luca PotenzaPotenza (0-0) – H2H and prediction
• Hugo GrenierGrenier – Alastair GrayGray (1-0) – H2H and prediction
• Mert Naci TurkerNaci Turker – Calvin HemeryHemery (0-0) – H2H and prediction