The Bundesliga side are in a good position to reach the last 16 of the Europa League next Thursday, but despite the euphoria of coming back from two goals down to score two away goals, there was a strict curfew.
"The players were all in bed very early," reported coach Armin Veh, who does not expect tiredness to be a problem in Sunday.
"It's always a lot easier to recover your energy levels when you have won a game," he added.
"I may even field the same starting XI."
Frankfurt must try to forget about Europe until after Sunday's game with Bremen since Bundesliga points are now crucial.
Both sides are level on 21 points, just three points clear of the relegation zone.
"The Bundesliga is our priority," said Frankfurt's director of sport Bruno Hubner. "It's decisive that we stay up and to do that, we've got to win our home games."
Bremen coach Robin Dutt is not speculating as to whether Frankfurt's trip to Portugal will be an advantage for his side, but admits he was impressed with what he saw on Thursday.
"Right from the first half, Frankfurt worked very well against the ball," Dutt said at a press conference.
"After they fell behind, they fought back well, but I don't know how well they are going to be able to cope with the trip. You'd have to ask Armin Veh that."
Dutt has had a full week of training with his team and hopes to be able to welcome Clemens Fritz, Aaron Hunt and Santiago Garcia back.
"I'm going to have some difficult decisions to make," he said. "Somebody's going to end up in the stands.
"We're going to have a full squad to choose from for the first time."
Fritz will decide for himself if he is fit enough, according to Dutt, who will make up his own mind over Hunt and Garcia.
"Some of my players know that they have a regular starting berth in my side, but they all still know that I can change things at short notice and that nobody should feel certain of their place," he said.