Chelsea manager Guus Hiddink was "disappointed" after his side's early Champions League exit.
The Blues produced one of their most impressive performances of the season in the final third against the French giants but defensive mistakes cost them the tie as they again crash out in the round of Last 16.
The Dutchman also confirmed that Diego Costa and Eden Hazard will be assessed this morning after both suffered injuries last night.
"I am disappointed," Hiddink told reporters.
"When you analyse the game we started too respectfully in the first 10 or 15 minutes, but they are a team who know the short possession game very well and you must be careful not to be outplayed in the first part of the match.
"We were too respectful but later on, at 1-0 down, we lost that wrong respect and we tried to defend more forcefully, we won duels and we got a deserved equaliser.
"There were chances both ways after that in the first half. In the second half we pushed, we tried to make it 2-1. We had chances to score in the 65th minute, we didn't do so and in the 67th minute with a little attack they killed the game.
"In my opinion, Chelsea are now in a transitional period from where they have to see how to go on, and to try to regain the lost terrain where Chelsea used to be. That's true.
"It's difficult to get in to fourth position, there is a very big gap. Chelsea must consider its short-term future on how to handle this, but they knew that beforehand.
"We will see if there is big damage [for Diego Costa and Eden Hazard]. Hazard has a little problem with his latest hip injury. Diego was desperate to play today although he was not 100 per cent fit. He was desperate. I don't know if that has become worse, we will see.
"I hope it isn't worse than before the Stoke game, because in two days we will have to play another game."