Rams were beaten 16-10 in Greenwood’s first game in charge of the Championship side and the match went as he expected.
Dewsbury have a new-look squad and Greenwood said: “It was a good workout.
“There was plenty of stuff to work on, for sure.
“It was a pretty scrappy affair, but as the game wore on we didn’t look any worse than Batley and that’s a sort of starting point.”
Greenwood added: “There were a lot of changes going on during the game and it was what I expected.
“I knew it would be scrappy and not a free-flowing attacking performance, but we got better as it went along.”
Dewsbury trailed 10-0 at half-time and Greenwood admitted: “We didn’t start off well. We didn’t look up to it, to be honest, but as it went on we grew into it.
“We looked stronger as it went on and probably looked the strongest team at the finish.
“It was out first hit-out and I was making changes because I wanted to have a look at certain people in certain positions. I was not downhearted, but there is a lot to work on.”
Lewis Heckford will be assessed after suffering a neck problem late in the game.
Rams also lost Jode Sheriffe following a clash of heads with teammate Dale Morton.