He has managed Athletic Bilbao and Marseille in recent seasons
Marcelo Bielsa has been appointed manager of Lazio.
The former Marseille, Athletic Bilbao and Argentina boss (60) takes charge of the Serie A side to permanently replace Stefano Pioli who was sacked towards the end of last season.
Bielsa is admired, chiefly by Manchester City manager Pep Guardiola, who once branded him the "best manager in the world".
Nicknamed the "El Loco" (The Crazy One), Bielsa's high-pressing, high tempo style is eye-catching and he brought that approach to Marseille and Atheltic Bilbao.
While there were high points at both clubs - including knocking out Manchester United en route to the Europa League final in 2012 - his intense style also led to background issues.
Bielsa was also linked with the Swansea job after the sacking of Garry Monk last season.