Hoang started playing tennis when he was 3 years old.
After not playing on the Junior Tour, he played a professional tournament for the first time in 2013. In the third-rate future in France, he lost at the beginning. In 2015 in Tunisia, he made his first final in this category. He steadily climbed up the tennis world rankings thanks to acceptable results , so that in July 2016 he was able to qualify for the first time for a tournament in the ATP Challenger Tour category in Scheveningen . There he lost to Yannik Reuter at the beginning . After participating in two other Challenger tournaments, he finished the year in the top 500 for the first time with rank 465 in singles. In doubles he had already won nine futures at the same time and was in 309th place. In the following year he won two of seven futures finals in singles and thus improved by almost 150 places, which means that he no longer qualifies in all Challengers had to fight. In doubles, he made it into the top 300 by the end of the year with rank 262.
In 2018 Hoang made a breakthrough on the Challenger Tour, where he had not previously won a single match. In Rennes he won six matches in a row starting from the qualification and only lost in the semifinals against Vasek Pospisil . A little later he got his first appearance on the ATP World Tour in Marseille thanks to a wildcard . In doubles he played alongside Alexandre Müller , with whom he failed to kick off against Andre Begemann and Michail Kukuschkin . After further good results at Challengers - the semi-finals in Francaville and Istanbul as well as reaching the finals in Orléans - he finally won the first title in this category in Eckental . In the final he defeated the Belgian Ruben Bemelmans in straight sets.