Gauthier Onclin and Sergio Callejon Hernando will clash against each other in the 1^st round of the Monastir Challenger for the 1^st time in their career. They are scheduled to compete on Tuesday at 6:30 pm on CENTRE COURT. Here the head to head stats and relative prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Gauthier Onclin who should win in 2 sets.

As per the initial odds, Gauthier Onclin is the pick to win this match.
Gauthier Onclin -> 1.36
Sergio Callejon Hernando -> 2.96

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Prediction and head to head Gauthier Onclin vs. Sergio Callejon Hernando

There is no head to head record between Gauthier Onclin and Sergio Callejon Hernando since this will be the first time that they will face off in the main tour.

Gauthier Onclin

Ranked no. 219, Gauthier will start his run in the Monastir Challenger after he played his last match in the Hamburg Challenger where he lost 6-4 6-0 to Squire in the 1^st round on the 20^th of October.

Onclin has a composed 28-26 win-loss record in 2025, 8-8 on hard (See FULL STATS).

The Belgian’s best result of the current season was getting to the final in M25 Santa Margherita di Pula.

Talking about his overall career, The Belgian has an overall 239-148 record. He has a positive 85-51 record on hard.

Previously in the Monastir Challenger

Onclin has never competed in this tournament before.

Sergio Callejon Hernando

Ranked no. 591 (career-high), Callejon reached the 1^st round after beating Olaf Pieczkowski 6-4 6-4 and Dali Blanch 4-6 7-5 6-2.

In the qualifications against Blanch, Callejon recovered from a 1-set down deficit before winning (4-6 7-5 6-2). During the match Callejon scored 95 points vs Blanch’s 83. Sergio was pretty aggressive to blast 40 winners.

Talking about serving, Callejon scored just 1 ace during the entire match and he committed only 1 double fault for the entire match. Sergio Callejon Hernando lost the serve 4 times and he saved 6 break points. Furthermore, Callejon put 72% of his first serves in, winning 63% (40/63) of the points behind his 1st serve and 60% (15/25) on the 2nd serve. Sergio broke Blanch 6 times after converting 67% of his break points (6/9).

Overall Performance in this tournament

Callejon started his run at this tournament from the qualifications. In the main draw, he has conceded 1 set in the tournament to win 55% of the points he played.

Callejon’s best result of the year was reaching the final in M25+H Tauste and M15 Monastir.

The Spaniard has a compiled 51-22 win-loss record in 2025, 49-17 on hard (See FULL STATS).

Tennis Scores in Monastir Challenger

• Adrian AndreevAndreev – Clement TaburTabur (6-7(11) 6-3 6-4) – Stats, scores, rankings
• Eliakim CoulibalyCoulibaly – Anas Bennour Dit SahliBennour Dit Sahli (6-2 6-0) – Stats, scores, rankings
• Petr BrunclikBrunclik – Matteo MartineauMartineau (7-6⁵ 6-3) – Stats, scores, rankings
• Eliakim CoulibalyCoulibaly – Anas Bennour Dit SahliBennour Dit Sahli (6-2 6-0) – Stats, scores, rankings
• Ilia SimakinSimakin – Max HoukesHoukes (6-2 6-3) – Stats, scores, rankings

Upcoming matches in the draw

• Radu AlbotAlbot – (0-0) – H2H and prediction
• Mert AlkayaAlkaya – Kimmer CoppejansCoppejans (0-0) – H2H and prediction
• Aziz OuakaaOuakaa – (0-0) – H2H and prediction
• Adrian AndreevAndreev – Clement TaburTabur (0-1) – H2H and prediction
• Mathys ErhardErhard – Dan AddedAdded (0-0) – H2H and prediction
• Francesco FortiForti – Remy BertolaBertola (0-0) – H2H and prediction
• George LoffhagenLoffhagen – Lorenzo GiustinoGiustino (0-0) – H2H and prediction