Sir Alex Ferguson won 13 Premier League titles during his time at Manchester United, so it is safe to say the Scottish manager knew a thing or two about success.
The last of those triumphs came during his final season at Old Trafford in 2013, in which the Red Devils recovered from a disappointing previous campaign to blow away the competition.
Manchester United finished the season 11 points clear of second-placed City in what constituted as one of the most dominant victories of the Premier League era, but Robin van Persie has revealed that Ferguson was still not satisfied with his players.
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In April 2013, United had the chance to go 18 points clear by beating their local rivals in a heated derby. They lost the game 2-1 and their deficit was cut to 12 points. Sergio Aguero's late winner sealed the win in a game in which eight players were booked.
While the derby win was rightly celebrated by City fans, it did not really matter in the title race. Manchester City knew their tagline as champions, earned in dramatic circumstances the previous season, had already been usurped by Ferguson's men.
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Try telling that to the man himself, however, who, according to Van Persie, was left fuming at the manner of the defeat and ripped into his players in the dressing room after full-time.
"We could have gone 18 points clear but still we were in a very good position. He was very hard on us, very angry," Van Persie told UEFA.
"He made everyone aware that everybody had to give their all. The training was very hard that week. He was almost punishing us. But that showed me he was a really good manager."
It is certainly the perfect way to sum up the legendary manager, who quite clearly got to the top of the game by refusing to let standards drop.
If only Van Persie had the same mentality. His game went completely off the boil after Ferguson retired with Rio Ferdinand later claiming the Dutchman was affected more than anyone by his surprise departure.
Fallen from grace
Having won the Golden Boot in that campaign with 26 goals, he scored just 22 Premier League goals across the subsequent two seasons under David Moyes and Louis van Gaal.
Now, he is struggling to get into the starting lineup at Turkish club Fenerbahce and has also fallen out of the Dutch national squad.
What would Ferguson say to Van Persie now?
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