The Manchester City loanee was handed the job of man marking Philippe Coutinho in the clash at Liverpool on Sunday and was never far away from the Brazilian who was substituted with an injured ankle in the first half.
Moyes was impressed with Denayer’s contribution, nullifying Coutinho in the time he was on the park, although he feels the 21-year-old will move back into central defence eventually.
"We sort of put him on Coutinho at the start of the game to try to nullify him," said Moyes. "Jason was disciplined - he's just getting used to the Premier League and the speed of things.
"We're pleased he's beginning to have an impact with us now.
"He played there last week and did a good job and I think he will become a central defender, he may just need a little bit of time."