Leeds United owner Andrea Radrizzani said he was very 'thankful and grateful' to Marcelo Bielsa as 'El loco Bielsa' (the madman Bielsa) has changed 'the culture of the club'.
The 65-year-old manager guided Leeds United to promotion to the Premier League for the first time in 16 years.
It will be Marcelo Bielsa's first experience in the Premier League after coaching teams in Ligue 1, Serie A and La Liga.