Leeds United boss Marcelo Bielsa was impressed with the work his side put in to restrict Manchester United to a 0-0 draw at Elland Road.
The last time these two teams met, Leeds attacked without fear, but lost 6-2 at Old Trafford.
Bielsa's side showed a very different side of their game in the return fixture, as they were happy to play for a point.
"In the game we defended well. We couldn't attack how we wanted to. Even if we didn't dominate, we avoided the game becoming unbalanced. There are signs of evolution," Bielsa told BBC Sport.
"The group of players have constructed a solid group. Throughout this time they made errors and have learned how to correct them.
"In the same way, they learned to avoid errors that are avoidable. I have the feeling there has been a growth in their maturity in how to manage these games.
"Clearly at this moment we cannot go into the games to dominate them and think we can win while dominant.
"But the capacity for the players to go up against these very good players has also increased. We can impose ourselves on defences and can avoid being overcome by attackers of the highest level."
