'Do you think I deserve to have this type of question?': Pep Guardiola reacts angrily to suggestions Man City's Treble has been tarnished by Financial Fair Play investigation

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Pep Guardiola reacted angrily to suggestions Manchester City's historic Treble has been tarnished by UEFA's Financial Fair Play investigation.

City became the first English club to complete a domestic clean sweep after demolishing Watford at Wembley, clinching their sixth FA Cup trophy and first since 2011.

The six-goal hammering was the largest in 116 years and there was confusion as to whether Raheem Sterling became the first man since Blackpool's Stan Mortensen in 1953 to score a hat-trick in a cup final.

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Pep Guardiola watched his Manchester City team complete the domestic Treble on Saturday

Gabriel Jesus was awarded City's goal after his shot trickled over the line but only after the full-time whistle had been blown.

Guardiola was later forced into defending the club amid a UEFA investigation into their finances, with the threat of a Champions League ban looming.

'We are not guilty until it's proven,' Guardiola said. 'I listen to my chairman and my CEO, they give me the arguments for why we are under investigation and I trust them.

'They tell me we fair and we absolutely follow the rules, I believe them. If the opponents and contenders think it's just about the money, it is OK.'

Guardiola was later left fuming by a question on FFP asked in his post-match press conference

Guardiola was visibly taken aback when then asked if he had profited financially from City's Abu Dhabi owners outside of his £15million-a-year contract.

'Do you know the question you're asking me?' Guardiola fumed. 'Did I receive money for another situation, right now, today? Honestly, do you think I deserve to have this type of question, the day we won the treble, did I receive money? Are you accusing me of receiving money?'

The tense exchange threatened to take the shine off City's monumental achievement. The nearest any team had previously come to completing a domestic Treble came in 1994, Sir Alex Ferguson's Manchester United, who completed the Double but lost the League Cup final.

'It's one of the best seasons I've ever experienced as a manager,' Guardiola added. 'I wouldn't say the best but one of them. Ten months, playing all competitions, and no team has done this in this country before.

'I was a player and this is all for the players. They are the reason why we've done what we have. We are there to help them, to push them.'

He fumed: 'Do you think I deserve to have this type of question, the day we won the treble?'

Vincent Kompany lifted his second FA Cup as City captain and then claimed they are the best team in world football.

'What a season, what a tremendous club,' Kompany said. 'It started with the manager, he sets the standard at the start of the season and said we had to go back-to-back.

'It's the best team in the world for me. To set such a high standard for so long - not just for one year but two years running now. What a club, what a privilege.'

Guardiola claimed beforehand that victory at Wembley would equate to a 'little Quadruple' after also collecting the Community Shield at the beginning of the season.

As such, the City manager counts victory over Javi Gracia's Watford as the 28th trophy of his glittering career.

Attention now turns towards the summer shake-up, with a number of high-profile names set for the exit, including Nicolas Otamendi and Fabian Delph, as Guardiola shuffles his pack.

They headed back to the North West on Saturday night before a victory parade on the streets of Manchester city centre on Monday evening, with Guardiola claiming they can still improve.

'We make mistakes,' he said. 'There are many things we can do better, believe me. Individual actions, individual movements. Some players need to improve. Maybe we'll have some new players coming to help us.

'We won the league by one point so we are not far away. Liverpool showed us how tough it'll be, this is the standard. There are always situations where you can improve.

'This club makes a big step forward with the investment. Can you do that without top players? No way. Money helps to buy the incredible players we have, yes.'

Gracia is adamant that Watford can use the run to the final as a springboard to better things. 'It is hard in this moment for the supporters but we have to look to the future,' he said.

'We are not satisfied with this defeat but it will be good for the future. It's a step forward for us, to live this experience. We'll have more options in the future, in the Premier League too.'