[ad_pod ]6-0.The biggest margin of victory in an FA Cup final since Bury beat Derby by the same scoreline in 1903.Not only that, but in recording such a result over Watford, Manchester City became the first English team to achieve a domestic treble of the Premier League, FA Cup and League Cup.A great way to round off what has been a phenomenal, record-breaking campaign, right Pep?Oh, it appears not.Are Man City better than Arsenal's 'Invincibles'? Fans discuss in the video below...Despite the win, Pep Guardiola was seen having a heated debate with two-goal hero Raheem Sterling, who almost netted a hat-trick on the day.

You would think that, after a season in which the England international hit 25 goals and recorded 18 assists, his manager would allow him to celebrate the FA Cup final win in peace, but no.

The former Barcelona and Bayern Munich boss was passionately instructing the 24-year-old on what he could've done better in the game, revealing in his post-match interview that he felt Sterling lost a lot of 'easy balls' and said that he did not play well in the first half.

This attention to detail and insistence on getting 100% from his players is why the Spaniard has been so successful wherever he has gone, and it is definitely a huge factor in Sterling's rise to becoming one of Europe's best forwards.

We've seen Guardiola do this before.

After the Manchester derby win last month, Guardiola confronted Sterling to warn him against showboating, despite the impressive victory that edged his side closer to the title.

We've also seen him do it to German international Joshua Kimmich whilst at Bayern, and also to a player on the opposing team in Nathan Redmond when Southampton took on City in the 2017/18 campaign.

Guardiola is an obsessive man hell-bent on his players getting every detail right, and you get the feeling that he certainly won't let them rest on their laurels over the summer as he prepares them for next season.