The hosts dominated their concluding Group E match against the Romanians but Mourinho's men failed to make the game safe by scoring a second goal after Demba Ba's 10th minute opener.
Chelsea finish top of the group after the narrow victory, but the Blues' profligacy in attack will remain a concern for the manager.
Mourinho told Sky Sports 3: "The second goal didn't arrive, when it doesn't the opponent is alive and enthusiastic...and fighting for the result.
"Normally we have to score more goals again and win comfortably with more goals and more emotions for the supporters.
"We had the game always under control. We had the chances, the corners, the dominancy, and played very well.
"In the first half we were quite strong. We still played a few long balls when we don't need to do that.
"We don't have enough patience sometimes to pass the ball and wait for spaces.
"Now we forget about the Champions League until 2014."
Also Mourinho wants a rematch with a striker who won three Premier League titles, four FA Cups, two League Cups and the Champions League during a glittering eight-year career at Stamford Bridge.
Mourinho said: ‘We had one target, which was not to win the Europa League again and that target is done. Now we have to do the best we can in the Champions League.
‘Yes, Galatasaray is difficult. The Turkish champions with King Didier. Very difficult. But I’d like Didier to be back here and feel what I felt. He deserves to come here and get the reception double or three times better and bigger than I had.
‘I think there are teams in better conditions than Chelsea to win the competition, or at least to be considered favourites.
It’s easy to understand that Bayern Munich are champions. They have the same team and, I think, played three Champions League finals in four or five years.
'You have Barcelona, same team and champions three times in the last five or six years. Real Madrid have the same players plus Gareth Bale.'
‘But let’s go for the last 16. If we win, we go into the quarter-final and, with only eight teams, we can think a different way.
‘But now we must forget the Champions League and work to improve the team and get results in the English competitions.’
Mourinho’s assertion that his Crash Test Dummies will not win the Champions League or Premier League seemed apt last night as his side failed to give Chelsea fans a ‘performance and a result to be proud of’.
