Leo Sauer

Sauer played for the Slovakia U-19 side alongside his older brother, Mario Sauer. Both were selected for the Slovakia U-20 side to compete at the 2023 FIFA U-20 World Cup in Argentina. On 5 October 2023, at the age of only 17, coach Francesco Calzona called him to the Slovak senior national team. On 26 March 2024, Sauer became the youngest ever player to play for the national team after coming on as a substitute in a friendly against Norway. He was included in the Slovakia squad for the UEFA Euro 2024 in Germany in June 2024. He made his tournament debut 21 June, becoming the youngest ever Slovak player at a final tournament.

Sauer started his football career with Slovan Bratislava. In the summer of 2018 he moved to the youth academy MŠK Žilina. Sauer made his debut in the 2. Liga for Žilina B on 27 February 2022 against FC Petržalka. Sauer joined Feyenoord initially on loan from MŠK Žilina in 2022, but in April 2023 signed a three-year professional contract with the Dutch club. On 20 August 2023, Sauer made his debut for the club in an away match against Sparta Rotterdam by coming in at half-time, scoring the 2–2 in the added time to secure a point for the club. On 12 August 2024, Sauer moved on a season-long loan to NAC Breda. On 29 July 2026, Sauer signed a five-year contract with Bundesliga club VfB Stuttgart. He made his debut for Stuttgart as a second-half substitute in a 4-1 win over 1. FC Köln on 4 September 2026.

Club

As of match played 22 March 2026

International

As of match played 31 March 2026

Sauer grew up with his parents in Bratislava. He has an older brother called Mário who is also a footballer, both attended the Secondary Sports School in Žilina.