The Christian life is depicted as a walk (Eph. 5:2-16), a run (Heb. 12:1-2), a war (2 Tim. 2:3-4), along with a number of other metaphors to help us get a “mental picture.” There is an interesting one found in Ephesians 6:12–Christians are wrestlers.
The English word “wrestle” (and its Greek original) is found only this one time in the New Testament. The wrestling in which Christians are to engage is not against fellow humans but 
against the devil and his evil forces. The Greek word used for wrestle means, “to throw, to swing; a contest (particularly a close hand-to-hand fight) between two until one hurls the other down and holds him down with his hand upon the neck.”
While much of the wrestling on TV is fake or rehearsed, your wrestling “against” the devil is very real! He is trying to pin you and to keep you from pinning him! However, when you have the Lord’s strength, the power of His might and God’s whole armor (6:10-11), you’re in a tag-team match against Satan with Jesus as your partner! You only lose if you leave the contest!