Chelsea were frustrated by a resolute Palace side in the opening 45 minutes but sprung into life after the break, with summer signing Ben Chilwell scoring on his Premier League debut for the Blues.
Kurt Zouma headed home an inviting cross from Chilwell to extend the hosts’ advantage just past the hour-mark and Jorginho put the game to bed with a two penalties in the space of five minutes.
Reacting to his side’s 4-0 victory, Havertz told Chelsea TV: ‘I think it was difficult for us in the first half because all the players were stuck in their own half from Crystal Palace.
‘But we said before the game that maybe in the second half when we play good, have a lot of room and I think after 15 minutes we did very good.
‘We had a lot of space, created good chances and scored four goals which is very important for us.’
Havertz added: ‘I think we had to play very fast, push the ball hard in our own half and the opposite side as well.
‘It’s always difficult to find room for our midfield players but I think we did very well in the second half.
‘We created a lot of chances, had good crosses in the box and I think it was good timing for us to score the first goal as it gave us good confidence and that’s the reason why we scored a lot of goals in the game.’
‘They have very good teams and I think the life, everything is different, even small things like driving on the right side.
‘But the football is different, life is different but the new players are settled in really well so I’m very confident to have a lot of wins in the next few weeks.’