LeBron James and the Cleveland Cavaliers defeated the Celtics in Games 1 and 2 at home, but according to James, the real test begins Thursday in Boston’s TD Garden for Game 3.

“We can’t play like we did, in Game 1 and Game 2, in Game 3. Too many mistakes, myself, the team, we have to be much better.” James said. “I know the fans here, and they know me. They don’t like me. But they know the game and its going to be crazy in there.”

Check out LeBron on Game 3: LeBron James On Game 3 in Boston

“We have to be very, very…, very good tonight. I don’t think the young guys understand the atmosphere that they’re going to be a part of. This place [Boston] is a place that’s got so much history. They’ve seen the best and all the magical games. It’s going to be a test for us.”

Check out LeBron on the hostile Boston environment: LeBron James Says Game 3 Will Be A Test