The French ace was given a wide midfield berth in Sunday's Community Shield with Mikael Silvestre starting at left full-back.
"Playing as a midfielder gives the team an additional option," Evra told the L'Equipe. "Plus it increases my chances of starting. I did well because I've already played there for Monaco."
Evra is delighted to kick-off the season with a trophy, but acknowledges it will be tough to reclaim their Premier League crown.
"The Community Shield is a trophy and to start the season with a trophy is a good thing," he continued.
"We have to retain our title, we have no choice. Everyone has strengthened so winning the title will be harder than ever."