One of the most intense rivalries to develop during the 2016-17 NBA season was the one between the Boston Celtics and Washington Wizards.

Over the four regular-season matchups, the home team won each time, but not without plenty of on-court fireworks and bumps and bruises.

In the playoffs, the two teams met up in the Eastern Conference semifinals, where the home-court advantage once again held up. The Celtics advanced to face the Cleveland Cavaliers in the conference finals after a hard-fought Game 7, winning all four of their home games.

The two squads are seemingly set to have another year of physical battles, but now there's a new twist in the rivalry, as Boston traded for forward Marcus Morris this offseason. His twin brother, Markieff, is on the Wizards and was one of the players at the center of some on-court drama between the two squads last year.

However, according to CSNMidAtlantic.com, Markieff said he's not planning on taking it easy on his brother's team this season:

"Honestly, I don't think it will change it. I don't think it will mess it up," Markieff said. "I just think it's gonna be a little bit softer than it was, just a little bit. But I think we'll still have our rivalry because we don't like those guys and they don't like us. I don't think that should change with my brother on the team."

The Morris twins have plenty of experience playing each other, as Marcus has spent the past few seasons with the Pistons, but they don't have experience squaring off in a rivalry as intense as the one between Boston and Washington, so it'll be interesting to see how they match up with one another this fall.

To be fair, Markieff understands that moving from Detroit to the Celtics is a good career move for his brother, so he holds no ill will that Marcus now plays for one of his squad's biggest rivals:

"I'm happy for him," Markieff said. "I think that was the best move for him, honestly. He gets to play for an organization like Boston. That's once in a lifetime."

Thanks to the way the schedule is set up, the Morris twins will get to spend Christmas Day together, as the Wizards travel to Boston to take on the Celtics in a highly anticipated holiday matchup.

Though there will likely be nothing but love between the two brothers during that game, it's safe to say the holiday spirit won't be shared among any of the other players.