The result gave the Millers a seven point cushion over the Latics in the relegation battle leaving the Latics six points from safety.
Speaking after the game, Evans said: "I thought Wigan started better than us, and for 10 minutes they caused us problems, Once we sorted ourselves out, we dominated for long spells.
"If it's based on good chances, Wigan could have scored a couple, but we could have had five or six today.
"Credit to my players, they're very young in the main but we are giving them the freedom to express themselves, they are showing great desire, when they equalised it didn’t affect them. They have been a credit to themselves as have the players who have been with us in League One and Two who were again outstanding.
"I have to praise my captain Craig Morgan and Kari Arnason who put their head on a lot of things in that last six minutes of additional time.”
The performance from Rotherham was that of a home side as they dominatd proceedings at the DW Stadium, much to the annoyance of the home crowd.