Good old Wiki:
A fanatic of football videos that he adds to his collection, Bielsa, on occasion, checks pitch measurements by pacing them out before deciding on a particular formation. He allocates separate training times for different parts of his squad. Former Argentine national team captain
Roberto Ayala, a defender under Bielsa, stated
"Sometimes we wouldn't see any of the strikers, because he'd have them training at a different time, and it was the same with the midfielders."
He is known for watching and collecting numerous football videos to the point of obsession. He edits and analyzes each video for each individual player. He also utilizes statistical software and other technological tools to prepare for games. John Carlin, an English journalist, has stated that Bielsa has "the most learned football library on the planet."
Former Athletic Bilbao striker
Fernando Llorente said in an interview, "At first he seems tough and he may even annoy you with his persistence and don't-take-no-for-an-answer resilience, but in the end he is a genius."
Current Bayern Munich and former Barcelona manager
Josep Guardiola called him the "best manager in the world" in 2012.
As Bielsa refuses to grant exclusive interviews, the press conference has become his preferred method of communication. He has been known to field every last question from the assembled media during these gatherings. If the talk turns to the intricacies of the game, a three- or even four-hour press conference is possible. According to him: "Every media should get the same attention from me, from the biggest TV station to the smallest newspaper".
