The Eagles lost 2-0 on the day, after goals from Dominic Solanke and Divock Origi, but De Boer employed a 3-4-3 formation and admitted that the players did not have much time to get used to the new tactics.
The former Inter Milan boss was happy to see his players work together as a team and was pleased with the overall performance.
“I think we learned that we were very disciplined today; that is our main goal as well as to play as a team and that starting point for me is very important,” he told the club’s official website.
“Of course we have to improve still, a lot, and work on details but first off we had to play as a team and I saw that today.
“We played against a very good opponent that everybody knows, and it was our first real game – we played internal games but this was a game played under quite hard circumstances with a new system.
“Only Ruben Loftus-Cheek played that system at Chelsea so we have to learn and adapt to it, and we’ve not even had three weeks on it, so from my point of view it was a good performance.”