NEIL Harris is aiming for better set piece execution from his side next season.
Mark Beevers scored from a free kick taken by Jack Powell in the win against Stevenage on Saturday, a week on from Sid Nelson scoring for the Lions from a corner routine in the draw against Wimbledon.
In recent years Millwall sides have largely been unable to capitalise on dead ball situations.
And Harris wants more goals to come from set pieces after two in two pre-season games.
“We need to be better with set pieces this year.” Harris said.
“We need to have better delivery to people in the box but we need to have desire to want to score a goal.
“I think at times the ball will go into the box and some players really have to have the mental strength to think the ball is coming to them.
“I've spoke to the players about that a lot and it's something we will continue to work on leading up to the start of the season.”
Harris added: “I think so many goals can be scored from set plays.
“Every time you get the ball in those areas, you put the ball in the box.
“It's a free cross at goal and a chance to make the first contact to head the ball in the net.
“Size helps but it's more about movement and desire.
“I was never the biggest or the quickest but I used to head the ball a lot inside the penalty area at set pieces.
"I used to read where the ball was going to go and because I wanted to header it. So I'm asking my players to do exactly the same.”
Goalscorer Beevers played at left back for the 73 minutes he was on the pitch at the Lamex Stadium.
And Harris said by having a smaller squad, he needs to have a look at players playing in different positions.
The Lions boss said: “I wanted to have a look at him in that position.
“He's an experienced Championship player who's played at left back for Sheffield Wednesday and for Millwall in that division.
“It was an opportunity to get him in the team and have a look at him in that position.
“We're not a big squad so we're looking at players who can play where needed.
“I thought Beevers was outstanding today, and he scored the winning goal.”