He is on the books of RAAL La Louvière and wears shirt number 26. His main role on the pitch is Defender. He measures 181cm in height and weighs 77kg. His stronger foot is Right. His estimated market valuation currently stands at 300K €.

His latest transfer saw him join RAAL La Louvière from Guingamp via on 2025-07-01.

Across the Belgian Pro League 2025-2026, Matthis Riou appeared in 14 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.