Friendships will survive and will have to wait. This, James Harden said, is about business. He said he has had no communication with his former Thunder teammates since the first-round matchup between his former and current teams was set Thursday. “It’s all business now,” Harden said. “Guys are competing for a championship.” He is not surprised to face the Thunder in his first playoff series with the Rockets. “It’s weird, but I knew it was going to happen like this for some reason,” Harden said. “That’s the beauty of it. That’s what basketball is.”