"They're not the Monstars. They knew we were going to give them that competitiveness and challenge, you know?" said Beal.
Boston found itself in a familiar spot against the Cavs who used a dominant first half in Game 1 to propel themselves to a 117-104 win.
Watch highlights of the win in the video above.
James has scored 30 points in eight straight games as he looks to visit the finals for the seventh-straight season.
Thomas played 18 minutes in the first half Friday night, but had a noticeable limp late in the half. Green made his first two shots - both 3-pointers - but finished with six points.
Coach Brad Stevens said that Thomas has been playing with a nagging hip injury that he aggravated "pretty significantly" against Washington in Game 6 of their East semifinal matchup.
Heading into the game, James was averaging 34.8 points, 9.0 rebounds and 7.1 assists per game in these playoffs. "When we went back to the locker room, our training staff and doctors got with him".
"Amazing, but he's better than when I first got into the league", said Stevens, in his fourth year in the league and now 0-5 against James and the Cavs in the postseason. "I mean, that guy is a tough guy, and he plays through a lot".
Thomas will be re-evaluated on Saturday.
Asked how much that hurt his team, Stevens said, "Not 44 points worth". "We can't panic. It's only one game", Thomas said after Boston's off-day workout Thursday. "I said before that we had another level and (people) looked at me like I was insane", he added. "You've got to be able to pick up the slack, certainly when other guys aren't available". "Point blank, period", said Brown.
Still, James said the Cavs are mentally preparing for the Celtics' best shot in Game 2. Boston's leading scorer, Avery Bradley, had just nine points. "We'll find out what kind of team we ae how we respond".
"I hope not", he said.
Thomas missed all six of his field goal attempts and had two points in 17 minutes as Boston was blown out by Cleveland, 130-86.
The Celtics team had its heart ripped out for the second game in a row at the Boston Garden. The trio went a combined 11 of 21 from three-point range.
The Cavs continued to pour on the points, while the Celtics were seemingly helpless to do anything about it.
Boston tried to fight back, scrambling to close out on defence and trying to send help to contain James on drives.
Kyrie Irving had 23 points for the Cavaliers, who return home with a chance to finish off the Celtics in Cleveland. Celtics fans could only boo loudly as Smith stood and posed under the 72-31 scoreboard.
It's a feeling shared by his players.