In May 2014, he joined her at the Cercle des Nageurs of Fontainebleau-Avon, where he remains committed to his training while becoming licensed in CSM Clamart Natation in 2016.

14 July 2016, the French National Day, he again won the 25 km[4] from the European Championships at Hoorn (Netherlands).

Axel Reymond, who resided in Nandy, began swimming at age 6 in "Association Sportive Le Plessis Savigny" (ASPS) in the pool of Savigny-le-Temple where he will be driven by Magali Mérino who is always his current coach.

Also in 2010, he will participate in an international event outside France for the first time at Oeiras in Portugal, finishing 8th in All Categories, of this "COnfederación MEditerránea de Natación Cup"'s stage (COMEN).

Then in 2013, in Ohrid (Macedonia), he won his first medal of the Open Water Marathon World Cup, on 30 km (19 mi).

Finally in 2015, he broke the French National Hour Time Record[3] during the National Meeting in 25-meter pool in Compiègne (France) with 5,859 m (3.641 mi), and he won a bronze medal for the 1,500 m (0.93 mi) of French 2015 Swimming Championships in 25-meter pool in Angers (France).

In early 2016, he joined the CSM Clamart Natation, while staying at Fontainebleau for his exercises in the CitéSport of the National Centre of Defence Sports (CNSD).

He beginning the 1st stage of the Marathon (10 km (6.2 mi)) World Cup 2016 in Viedma, Argentina, finishing 5th, allowing him his pre-qualification at the European Championships 2016.

At the French National Day in Hoorn (Netherlands), on 14 July 2016, he won gold[4] again on 25 km during the 2016 European Championships.

On 16 June 2018, he participated in the 4th stage of the 2018 Marathon World Cup in open water, and won a bronze medal in 1h55:59.1, Hungary.

In Budapest (Hungary), on May 16, 2021, where he became world champion, Axel won the 25 km of the 2020-21 European Championships for the 3rd time over this distance.