Chelsea boss Mauricio Pochettino was delighted with his players after their 3-2 win against Brighton.
Enzo Fernandez scored twice as Chelsea handled Conor Gallagher's first-half dismissal to eventually win.
Pochettino later said: "We are a young team with young players and we need to improve,' he said. 'We need to learn that the Premier League is the best league and we have many players that need to believe and feel that they play in the Premier League. During this period, after Newcastle when we didn't show our true selves, we wanted player well, we wanted to show that we care and win the game.
"The team was really good, I feel very proud because Newcastle was tough and then again Brighton is always difficult to play and in the first 25 minutes we scored twice and were controlling the game. We were a little bit flat when we conceded at the end of the first half In the second half and then Gallagher was sent off. It wasn't a red card, but that is my opinion, maybe I am wrong.
"I am so proud of the players and the character they showed. I told them at half-time I was happy because it was a great opportunity for us, a massive challenge. We needed to show that we are a team. That is something that for sure will improve us.
"It's not only about building the way you want to play and the philosophy on the pitch. Before that you need to feel that you belong to the team, you need to belong to the club, you need to settle yourself, you need to grow, you need to get experience. There are many things before you can talk about going and playing out from back, or playing with three or four offensive players, or three or four at the back. That is coming after.
"Most importantly, I think we needed this type of game that challenged us and the opportunity to understand that we need to be a team and behave like a team out there. I am pleased for that and of course we are going to improve because we have very talented players."