AJ AuxerreSierralta has won the Chilean Primera División with Universidad Católica in 2018 and 2019. He also helped Watford gain promotion to the Premier League in the 2020–21 season.
Francisco Sierralta is a Chilean centre-back who began his professional career at Universidad Católica before moving to Europe. He joined Watford in 2020 and later moved to AJ Auxerre in 2024. Sierralta has represented Chile at the international level, earning caps for the senior national team.
Sierralta is a strong and physical defender known for his aerial ability and tackling. He is comfortable in a back three or four, using his height and strength to dominate duels. However, he can occasionally be caught out of position against quicker forwards.