I respect Bielsa a lot. For me, he is a special coach. I think the best coaches in the world work in different things, and a lot of coaches, we cannot train like Bielsa. It's difficult to train like Bielsa. But every coach can learn from different coaches. But with Bielsa, I think all coaches learn something from him.
Before Wenger came, Arsenal celebrated 1-0 and were based on defensive solidity. With Arsene, joy came from attacking, with players of good standing. And the perfect combination was the Invincibles. But over time, only technical quality and offensive freedom were taken care of, losing the defensive structure.