Career
2019: Juniors
A member of Ninon Tennis Club in Pornichet, he was European U18 champion in both singles and doubles in 2019, playing doubles alongside Harold Mayot.[4]
2022: First ITF title
In May, Royer won his first ITF title in Ulcinj, Montenegro, defeating Samuel Vincent Ruggeri in the final.
2025: Major debut & first win, ATP final, top 60
In February, Royer won back-to-back Challenger 100 titles at the two editions of the Rwanda Challenger, defeating Andrej Martin in the final,[14][15] and the following week at the Rwanda II Challenger, defeating Guy Den Ouden in the final.[16][17] As a result, Royer reached the top 125 at world No. 121 on 17 March 2025.[18] He reached his third straight final at the 2025 Zadar Open, where he lost to Borna Ćorić, but despite the loss reached the top 115 in the ATP rankings on 24 March 2025.[19][20]
In May, Royer received a main draw wildcard for the 2025 French Open, marking his Grand Slam debut.[21][22] He lost to Daniel Elahi Galán in the first round.[23]
In June, Royer reached the final at the 2025 Bratislava Open. He lost to Dino Prižmić in the final.[24]
In July, Royer made his Wimbledon debut, reaching the main draw as a qualifier after defeating fellow countryman Titouan Droguet in the final round.[25] In the main draw, Royer upset 26th seed Stefanos Tsitsipas recording his first Grand Slam win.[26][27] He lost in the second round to fellow countryman Adrian Mannarino.[28]
Royer also made his ATP Tour debut as a qualifier at the Canadian Open.[29] He lost in the first round to Nicolas Arseneault. In August, Royer earned his first Masters 1000 win at the 2025 Cincinnati Open as a qualifier, defeating Sebastian Ofner in the first round.[30] He lost in three sets to 14th seed Karen Khachanov in the second round.[31]
In August, Royer made his US Open debut after receiving a wildcard into the main draw.[32] He recorded his second major win by defeating Bu Yunchaokete in the first round.[33]
At the 2025 Hangzhou Open Royer qualified for the main draw and reached his first ATP final upsetting three seeds en route: top seed Andrey Rublev, recording his first top-20 win, seventh seed Learner Tien and fourth seed Corentin Moutet.[34][35] As a result he reached a new career-high of No. 76 in the singles rankings on 22 September 2025.[36] He lost to Alexander Bublik in the final.[37]