NEW YORK -- Terry Collins said he does not expect any retaliatory plunkings on Friday after Bartolo Colon drilled two batters in the series opener, including Jayson Werth on the left side, which prompted Colon to get ejected.

Collins said the Mets routinely deal with aggressive inside pitching from the Washington Nationals. So, he insinuated, they’re not exactly an innocent party anyway.

“I don’t know why there would be,” Collins said about retaliation from the Nats. “We certainly can sit down and have a debate with them if they want, because we had an issue with them drilling [Juan] Lagares the last time. They knock David [Wright] down all the time. We just keep playing.

“It was one of those things. And I’ll bet if you ask Jayson Werth was he surprised, probably the answer is no. I think the deal was the ball got a little up. I think that’s probably what bothered everybody, because certainly after you saw what happened to the two guys last night (Giancarlo Stanton and Chase Headley), if you’re going to hit somebody, you certainly don’t want it to be up around the head.”

Stanton and Headley both were sent to the hospital after beanings.