Neil Harris admitted there is still room for improvement after watching his Millwall side triumph over Doncaster Rovers in Sky Bet League 1.
A 2-0 success at The Den on Tuesday night saw the Lions climb up to eighth in the table, but the manager is well aware that his team are not the finished article just yet."We were not at our best tonight, that's for sure," Harris told millwallfc.co.uk.
"I wasn't a happy man at half-time but I told the players and in the second half we did improve.
"There were some positive passages of play for us and what is pleasing is the spirit the group showed once again.
"What tonight has proved is that while we are making small steps forward we can get better. And we will."
Steve Morison proved to be the difference between the sides, netting both goals inside the first eight minutes, and Harris praised the striker, adding: "Yet again I thought his performance was outstanding. He led the line well and is always an outlet for us going forward.
"Steve will probably admit that there have been games where he has played even better and not scored, but his performance was still very good and I'm delighted that he has been rewarded with the winning goals."