Marcos Nicolás Senesi Barón (born 10 May 1997) is an Argentine professional footballer who plays as a centre-back for Premier League club Bournemouth and the Argentina national team.. Senesi made his debut for San Lorenzo on 25 September 2016 as a starter in the Argentine Primera División match against Club Atlético Patronato.

On 16 September 2017, he scored his first and only goal for the club in a 1–0 win against Arsenal de Sarandí.

On 2 September 2019, Senesi signed a four-year contract with Dutch football club Feyenoord.

[4] On 8 August 2022, Senesi transferred to Premier League club Bournemouth on a four-year contract for an undisclosed fee.

He was called up to both the Italy and the Argentina national teams, who were both due to face each other for the 2022 Finalissima June 2022.