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The next surprise is likely to be a bit controversial, there have been rumors Pep Guardiola will leave the club after successfully bring Manchester City to the top of the Premier League and ucl, yes although I hope that never happens. But Pep's past at Barcelona became a reference where he left Barca when the team was experience great success because it win various competitions.
There are many factors that made Pep Guardiola leave Barcelona in the past.
The most likely problem is about the team's finances or internal problems that are not conducive. I couldn't imagine the same thing he would do at Manchester City after he broke such an important record for that team.
Manchester City have good financial strength to give Pep Guardiola the comfort to be able to stay longer. I wouldn't think Pep Guardiola would leave Manchester City, but it could happen in the future when he has good reasons to leave.