After placing eighth at the 2019 JGP United States, Hamon/Streklain debuted on the senior Challenger series with a seventh-place finish at the 2019 CS Finlandia Trophy. They would go on to place tenth at the 2019 CS Warsaw Cup, and ninth at their first European Championships. Hamon/Strekalin also won the French senior national title for the first time, due to the absence of James/Cipres from the competition season. They finished the season at the 2020 World Junior Championships, where they placed fifth. Hamon/Strekalin were scheduled to participate in the 2020 World Championships in Montreal, which would have been their senior World debut, but these were canceled due to the COVID-19 pandemic.