Stephane Paul Keller (born 20 August 2001) is a Cameroonian footballer who plays as a central defender for Croatian club NK Istra 1961, on loan from Spanish club Deportivo Alavés.
Promoted to the reserves in Segunda División B ahead of the 2020–21 season, he made his senior debut on 24 October 2020, coming on as a second-half substitute for Sergi García in a 2–0 home win against Arenas Club de Getxo.
[3] He made his first team – and La Liga – debut the following 10 January, replacing Rodrigo Battaglia in a 1–3 away loss against Cádiz CF.
[4] On 22 July 2024, Keller was loaned to Croatian Football League side NK Istra 1961 for one year.
[5] Keller played for the Cameroon U23s for a set of 2023 U-23 Africa Cup of Nations qualification matches in March 2023.