Chelsea manager Frank Lampard believes his players are constantly learning from each match.
The Blues endured a rocky start to the season, but have since stabilised and shown a level of consistency that was missing from previous displays.
Now they face off against Ajax in the Champions League group stages.
"Yes, yes it is [a tight group]," said the Chelsea boss to reporters.
"We got a good result in Lille which changes the face of it slightly. Now, these two games against Ajax are really big. They have been such a strong team, they've got points on the board and they will give us a problem.
"In terms of the atmosphere in the stadium, they are going to be strong. The movement and the way they play football is going to be a big test for us. We go there relatively confident so let's take on the challenge.
"I think everything is an education in football. Today we were trying to break down a team with 10 men behind the ball a lot of the time. Lille was a big education for Champions League debuts for Tammy, Mason [Mount], Fikayo [Tomori] and Reece [James].
"Another one with Ajax who are a top-level team who have managed to get to the semi-finals. They have good players who play a certain way. Off the ball, you have to be fully concentrated. In terms of what they can do to you, how they play, so yes, it is a big challenge."
Chelsea have three points from their first two matches, while Ajax are top of the group with six points.
