Wolves manager Bruno Lage says his new back-four system is a 'work in progress'.
Lage employed the system for Saturday's draw with Fulham.
"I'm happy with the four at the back but now we need to work more," Lage said.
"Especially the game between the lines. What they did in the first 20 minutes, they blocked Ruben (Neves) so he couldn't have the ball, so we have to understand that (Nathan) Collins and Max (Kilman) should be more aggressive.
"We started to improve and found spaces between the lines. Then we dominated more and created more chances – these are the things we need to improve in a different system
"The other thing we need to grow up, is the emotional control. In the last 10 minutes we lost the position.
"I put men on with fresh energy to try to explore the games on the sides, and we didn't get the chance. We lost the position and balance and we gave chances to the opponent."
