The Celtics are still two teams — one very good, one not — as they head into their 63rd game of the season tonight against the Bobcats. If they have learned anything while winning 14 of the 19 games since Rajon Rondo was lost for the season with a torn ACL, it’s that they can mask some of their weaknesses and take best advantage of their depth when they push the pace. But when games break down to a halfcourt tug o’ war, the Celts are often lacking against teams that can better exploit matchups. Doc Rivers said as much when trying to project what he’s seeing now to the postseason. “I like our team,” he said. “I like the vets we have on this team. “I don’t know who we’re going to be in the playoffs. I don’t yet. I just haven’t given it a lot of thought. “Not having that playmaker will make a difference then because the game slows. It makes you execute. So we’ll see then. But this team is capable of going deep and doing some things. I really believe that.”