Lue, 42, is now an assistant coach under his friend and mentor, Doc Rivers, with the LA Clippers. They host the Cavs on Tuesday in Lue’s first game against his old team. “I don’t think it should’ve happened,” Lue said. “When it happened, I just kind of … It puts everything in perspective. You’ve got to continue to keep working, it’s a business — you’ve got to understand that. It was tough. To win the first championship ever in Cleveland history, and then make the finals (the next two years) and then get fired six games in, it’s hard to swallow and it’s tough to deal with. You start thinking about things like what you could have done different or if it was going to happen if you did anything different anyway. “You don’t see that very often where a coach goes to three straight finals and wins a championship, and gets fired (the season immediately after the third finals), six games into (the season). You probably have never seen it.”