With the score level at 1-1, Saville curled in to make it 2-1 with 10 minutes left before Kadeem Harris notched the third.
"It is a very proud moment for me," Saville told the club's official website. "I am really pleased to get on the score sheet.
"The ball rolled in to my path and I hit it. It was a good goal."
Saville is currently on loan from Chelsea.