Jorginho was guilty of a moment of horror five minutes after the start of the second half as the Premier League leaders were held to a 1-1 draw.
Jadon Sancho has sacked United after his Ballon D’Or contender poorly controlled a long clearance from Bruno Fernandes.
Sancho grabbed the free ball, freed himself and slid his shot in front of Edouard Mendy.
But Tuchel refused to blame the Italy international, saying: “He misjudged the situation and I think he was greatly disturbed by the lights. It happens.”
Jorginho showed commendable courage to save a point for Chelsea, later equalizing from the penalty spot.
He was guilty of missing a crucial kick for his country earlier this month – and Tuchel said: “It takes a lot of courage and personality not to be affected during the game and to have the courage to shoot the penalty. I am very happy he did.
Tuchel was adamant. Chelsea deserved all three points after dominating against United.
He added: “I am absolutely happy with what the players put on. We created chances, had deliveries, had a huge amount of shots. Can we take them better? Yes.
“We’ve had so many high ball recoveries so can we maybe create more chances from that superiority and those wins? Yes maybe. But listen, we’re putting in the effort and the spectators are feeling it.
“So the energy is good, the quality is good and the result is the result. Today it was not in our favor. It should have been, but we have to accept.