Marcelo Bielsa appears to be a manager with few regrets given the expansive manner in which his side set up regardless of the opponent, but his record against Jose Mourinho may well leave him with some sort of an uneasy feeling.
The Argentinian has lost all four of his matches against his Portuguese counterpart when they were bosses at LaLiga sides Athletic Bilbao and Real Madrid respectively at the beginning of the previous decade.
His fifth attempt comes on Saturday afternoon with Leeds travelling to the Tottenham Hotspur Stadium in both sides' first game of 2021, but there is perhaps much greater optimism going into this fixture than during any of the meetings against Mourinho during his time in the Basque Country.