Marcelo Bielsa believes his Leeds team showed bravery and faith for continuing to attack with 10 men, following their 4-2 defeat to Nottingham Forest.
The Reds took an early lead when Jack Colback chased a lost cause and capitalised on a dreadful Adam Forshaw backpass.
The afternoon soon worsened for the Championship leaders when Kalvin Phillips was dismissed for a lunging tackle on Adlene Guedioura.
Leeds’ second-half fightback appeared to be on, as substitute Jack Clarke side-footed the leveller, before Ezgjan Alioski smashed Leeds ahead.
But, three goals is seven minutes from Colback, Murphy and Osborn fired the hosts to a 4-2 victory.
Speaking via Leeds Live, Bielsa said: “We had as succession of facts and they are not very frequent. All of these facts were against us.
“We had to play with a player less. We were a little bit fragile in defence. During the 90 minutes we did everything to win.
“The players did a very big effort. When we scored the second goal I thought about a change to put a defender on instead of Phillips (?).
“Honestly I didn’t take a decision, but I could not find a useful player at that moment.
“Roofe was very helpful in attack. Hernandez was managing the times of the team. Klich was giving dynamics to our play. Clarke would create an imbalance on this side. Alioski was doing an important job on the left.
“It means our offensive players were doing very well. In defence we were outnumbered.
“It’s not a new fact we have problems at set-pieces. It’s not a new fact we make it easier, sometimes, for the opponent to have chances to score. The game has this kind of risks.
“The fact we dared to play, sometimes it has negative aspects, but it also gave us a style we should be faithful for.”
Bielsa was asked whether he would finally give in to signing a defender in January, but the Argentinian manager insisted this would not reverse his side’s fortunes after back-to-back defeats.
“If you take out the goals scored from set-pieces we are the team that concedes the least goals in actions,” he explained.
“Obviously, set-pieces are a part of the defensive actions. We can’t hide the fact we are lacking good headers like Gaetano Berardi and Liam Cooper.
“Even if in the last game we made some corrections, the solutions we found are not final solutions. I don’t think we can solve this problem with a new player.”