The Serbian also said that he would not be taking his fourth-round opponent Tommy Haas lightly when they play next week.
"Everything went my way; I haven't lost many points on my service game, I enjoyed it very much and it's very enjoyable when everything works well," he told BBC Sport.
"Not many times on the grass against a big server you get to return this well on what is the fastest surface."
"[Haas] is playing maybe his best tennis ever. I don't see a clear favourite. Hopefully we'll put up an entertaining match."
Djokovic has yet to drop a set at this year's tournament.