Bielsa's team defeated an opponent away.
Aston Villa, one of the leaders of the Premier League, hosted Leeds and suffered its first defeat of the season.
The Villans' gates were ripped three times by striker Bamford, who made a real performance in the second half.
Aston Villa - Leeds 0: 3 Goals: Bamford, 55, 67, 74 Aston Villa: Martinez - Targett, Mings, Konsa, Cash - Douglas Louis, McGinn, Barkley, Grealish, Trezeguet (Traore, 66) - Watkins.
Leeds: Meslier, Dallas, Koch, Ayling, Strake (Shackleton, 21), Harrison, Klich, Alioski, Elder Costa (Rafinha, 83), Bamford, Rodrigo (Hernandez, 79).
Warnings: Mings, Grilish - Strake, Klich.