Francisco Andrés Sierralta Carvallo (born 6 May 1997) is a Chilean professional footballer who plays as a centre-back or defensive midfielder for EFL Championship club Watford and the Chile national team.

Sierralta began his career with Universidad Católica and made his debut in the Chile Cup against Barnechea on 8 July 2015.

He made his league debut on 26 September, replacing Marco Medel in the final minutes against Huachipato.

[5][6] On 9 September 2020, Sierralta joined Championship club Watford on a three-year contract.

This biographical article related to a Chilean association football defender is a stub.