Sisinio González Martínez

International career In the 2003 FIFA U-17 World Championship, Sisi was a key element for Spain, who finished runners-up to Brazil (1–0). FIFA described him in their technical report as a "...well-developed technique and ball control, fast and agile", as he was listed amongst the nation's Talented Players list.

Two years later, Sisi appeared against France in the 2005 UEFA European Under-19 Championship, as the national team failed to qualify for the final stages in Northern Ireland, losing 1–0 in the elite round. In 2007, he progressed to the under-21s.

Coaching career On 7 June 2024, having previously worked as Beñat Labaien's assistant at Tokushima Vortis, Sisi returned to Valladolid as manager of the Juvenil B squad. He was promoted to the Juvenil A in February 2025, before becoming a part of Guillermo Almada's staff at the senior first team as a technical assistant.

On 15 December 2025, after Almada expressed his interest in leaving for Real Oviedo and was subsequently suspended by Valladolid, Sisi was appointed caretaker manager of the main squad. On his second-tier debut four days later, they lost 3–0 at SD Eibar.

Career statistics +Appearances and goals by club, season and competition

Division!!Apps!!Goals!!Apps!!Goals!!Apps!!Goals!!Apps!!Goals Valencia B 2003–04 Segunda División B

2004–05 K League Challenge

Lech Poznań 2015–16