The Blues beat Dynamo Kiev 2-1 at Stamford Bridge on Wednesday night to move up to second spot in Group H, two points clear of Kiev and three points behind table-toppers Porto, with two games left to play.
Alexander Dragovic's own goal in the 34th minute gave Chelsea the lead before the same player scored the leveller in the 78th. Willian - who has been Chelsea's best player this season - scored the winner seven minutes from stoppage-time.
However, Mourinho was really pleased with way his side responded when they conceded.
‘To qualify we didn’t need a win so it wasn’t a drama at 1-1,’ said the boss, as chelseafc.com reported. ‘We knew with a draw that if we win the next two matches we would qualify in second.
'From a metal point of view it was important to have a reaction to a negative moment. In other matches we’ve had good periods and played well, but when the negative moment arrived the team felt it too much and it was difficult to emerge again.
‘Today it was perfect because we conceded a goal with 15 minutes to go and the team emerged. They knew a draw would be acceptable but they wanted to win.
'To have people like Hazard and Pedro on the bench helps the morale of the team because they know they can change the type of game we were playing, because with Oscar and Willian as wingers it’s a certain kind of football, with Pedro and Hazard it’s different.
‘To win after conceding with 10-15 minutes to go was important. It’s something I spoke with the players a lot about in the last two or three days, saying when the difficult moment arrives, face it, don’t be affected, keep the belief and they were fantastic.
‘Now we can still finish first, which isn’t the most important thing. The most important thing is to finish second (and qualify) but we can still finish first.’