Francona, who joked about wearing his uniform back to his nearby apartment following Game 6, said he didn't sleep well on Tuesday night.
"I had a nightmare that somebody broke my ribs," he said.
Francona said he woke up and realized he had fallen asleep on his TV remote control, which had pushed deep into his ribs and left a mark.
Beyond that, Francona, who ordered $44 worth of ice cream from room service while the team was in Chicago over the weekend, said his room looked like a "national disaster."
"I had peanut butter on my glasses," he said. "It was a bad night, man."
As for the big game, Francona said he isn't punishing rookie center fielder Tyler Naquin by sitting him in Game 7.
Naquin let a fly ball drop between him and right fielder Lonnie Chisenhall in the first inning of Game 6, a mistake that paved the way to Chicago's 9-3 win over Cleveland.
Later, Naquin came up with the bases loaded in the fourth but struck out.
Francona said he feels Naquin is "pressing a little bit. During the regular season you might kind of let him get through it, but with one game left and with (Corey) Kluber pitching, we're trying to put a premium on catching the ball."
Rajai Davis will start in center against Cubs right-hander Kyle Hendricks. With the prospect of facing lefties Aroldis Chapman and Jon Lester late in Game 7, Francona wanted to have the right-handed hitting Davis in the lineup.
"You can tell he's pressing," Francona said of Naquin, who is batting .143 in the Series. "It's not punishment. It's trying to win."