You have to go back more than three years for Pep Guardiola's last defeat in the League Cup — on October 26, 2016, when his weakened Manchester City lost to a Juan Mata goal in the fourth round at Old Trafford.
It happened during his difficult first season in English football and left City without a win in six games, his worst run as a manager.
Fifteen matches and four penalty shootouts later, Guardiola is still going strong.
Manchester United boss Ole Gunnar Solskjaer insists Pep Guardiola has 'raised the bar'
Solskjaer says it will 'take time' for his side to reach Manchester City's level consistently
The 46-year-old wants his side to repeat the display they put on in their last clash with City
He returns to Old Trafford on Tuesday night for the first instalment of a two-legged semi-final against Manchester United as a back-to-back winner of the Carabao Cup, seeking a hat-trick of successes.
Yet to hear the City boss speak on Monday, you got the impression that progress to this season's final on March 1 would still mean more to United than City.
'It's not the biggest competition in the world but it's nice to be there,' said Guardiola.
It has become the norm before Manchester derbies to weigh up the balance of power between United and City, and Guardiola referenced Sir Alex Ferguson's famous 'noisy neighbours' barb with a smile on Monday.
But if anyone thought United's win at the Etihad in the Premier League last month signalled the start of a shift, it didn't feel that way talking to the two managers involved.
Indeed, United's celebrations that day demonstrated just how much they have come to value a victory over their once inferior rivals who are also back-to-back Premier League champions and completed a clean sweep of domestic trophies last season.
City may have fallen behind Liverpool this term, but they are still 13 points ahead of a United side who come into this game on the back of a limp defeat at Arsenal and failure to register a shot on target in the FA Cup draw at Wolves.
'It's a different era and a different time,' said Ole Gunnar Solskjaer. 'When the owners came in, you knew they were going to go for it. We are still in our own heads one of the biggest clubs in the world, but we know that's going to take