The Peacocks looked to be coasting home with an emphatic victory when Helder Costa put them 4-1 up on 57 minutes, but the West Londoners fought back through Bobby Decordova Reid and Aleksandar Mitrovic’s goals midway through the game to set up a nerve-shredding and nail-biting end to the game.
Bielsa was far from impressed with his team’s display despite Leeds’ first win of the season.
"It was a difficult game, it was difficult for us to defend and to attack and it was difficult for us to impose our style on our opponents,” the Argentine manager told BT Sports after the game.
"In the first half we allowed them to play out from the back too easily and even though we didn't defend too badly, we couldn't attack.
"In the second half after 4-1 they reduced the scoreline in a short amount of time but it was because they played well rather than we played badly. From then on, we played well."
Striker Patrick Bamford, who scored and provided Leeds’s third and fourth goals respectively, has insisted he does not wish to see a similar scoreline again, making reference to last weekend’s game against Liverpool.
“I hope not! We showed a good side of ourselves [against Liverpool]. Today was obviously a crucial match,” he said.
“We wanted to win but it was a bit too close in the end. There will be a few meetings next week to see where we went wrong but we won and that's the main thing.”
"The second goal caught us off guard and the third goal wasn't long after that so it made us panic a bit. We managed to see it out but watching from the sidelines was horrible when I came off!"
