Leeds United kept a second consecutive clean sheet in the Premier League as they beat Everton 1-0 at Goodison Park.
Raphinha scored the only goal of the game in the 79th minute despite the fixture producing 38 shots between the two teams.
The Toffees had two disallowed goals courtesy of VAR, although the Whites also had a goal chalked off due to an offside.
The victory brings the Premier League new boys up to 14 points after just ten games in the campaign.
Marcelo Bielsa spoke to the media after the match to give his thoughts and we've rounded up the five key quotes.
On Raphinha's impact
Raphinha is one of the latest signings to join Bielsa's side after signing from Rennes in the summer, and the praise is already heaving in for the Brazilian.
"He's a player who has adapted very quickly to the Premier League. Victor Orta who chose him and brought him here had identified that he had the necessary qualities to adapt to the Premier League.
"He's a player who can unbalance, who's potent who moves all around the pitch and has the capacity to unbalance from everywhere."
Neutralising Dominic Calvert-Lewin
Dominic Calvert-Lewin went into the fixture leading the Premier League goalscoring charts with ten games in nine fixtures.
However, Leeds United were able to nullify the threat from the English striker.
"It's not easy to neutralise him. The whole team made a big effort defensively to stop him, especially out centre-backs against him.
"But he had chances to score and we worked so that the opportunities he had on goal would be difficult ones. But nonetheless, he was a player who was as dangerous as he usually is."
It was the first time that two top coaches in Bielsa and Carlo Ancelotti had faced each other in a competition.
However, Bielsa was keen to mention that it was not him that beat the Italian manager.
"First of all, I did not beat Ancelotti, Leeds beat Everton. I think the victory should be attributed to the 11 players on the field, it was 11 versus 11.
"It was very difficult to defend against Everton and it was infinite modifications throughout the game and this shows the strength of Ancelotti so I think we should attribute it to the 11 players out on the field who won the game."
Why he waited so long to make a substitute
Fans watching across the country were questioning why Bielsa hesitated to make a substitute until so late into the game, despite Ancelotti using up all three substitutes.
However, he justified this in his press conference.
"It was a game where it was very difficult to come on. You had to come in ready to this game, there was a big intensity and you needed to be switched on to be able to come on.
"I thought that unless there was something indispensable, I wasn't going to make any changes. The players that came off were ones that were very tired or had small knocks."
His plan for the left-hand side
It was evident that Leeds overloaded the left-hand side of the pitch at times to create a numerical advantage.
Bielsa explained the reasoning behind this.
"It's true, what you said corresponds with what happened. The players on the right-hand side for Everton were [Ben] Godfrey, [Tom] Davis, [Abdoulaye] Doucoure and James [Rodriguez] and it was difficult for us to neutralise them but there were players on our side who as well as defending were also attacking. So Raphinha, Mateusz Klich, Ezgjan Alioski and Stuart Dallas they were also able to unbalance the opponent."