The left-back, a summer signing from Leicester, was given a run-out by Frank Lampard last night in our 6-0 Carabao Cup victory over Barnsley, having had to remain patient for a first outing due to a troublesome heel injury sustained last season.
"I feel happy," Chilwell told the club's website. "It was my first set of match minutes for a while, so I'm really pleased and of course absolutely delighted to make my Chelsea debut.
"It was good to come on in a game like that, where the boys were playing well. Matches are what I need, to get my fitness up, so I was pleased to get out there. You can train as much as you want, but playing in a game is totally different so I was really pleased to be out there.
"To get up to speed, you need to be playing matches and I think this game was important for me in that regard. The gaffer spoke to me before the game and he told me that he wanted to bring me on for 30 minutes or so to try and get up to speed, so I was really pleased to be able to do that."
Chilwell marked his Blues debut with an assist in the 6-0 win. His left-wing cross picked out Olivier Giroud who made no mistake by nodding home the sixth goal.
He added: "I've seen Oli score goals like that for years in the Premier League, so I knew if I got in a good cross he would be on the end of it.
"He's done it for years in the Premier League and even in training, he's exactly the same. So I just looked to swing in a good ball into the right area and he'd be there. We've got some really good strikers at this club, so as long as we provide them with good service, then I'm sure there will be many more goals like that over the season."