Bayern Munich striker Thomas Muller isn't surprised seeing Pep Guardiola struggle with Manchester City.

Muller always expected his former manager to need a season to settle in.

"The Premier League is very difficult with many strong teams. It's not easy to win against every team. You have a lot of games in England," he told FCB.tv.

"It's the first year of Pep being at Manchester City, and there are many factors which make the task difficult for him.

"For me, it's not a big surprise that there aren't any clear start-to-finish winners of the title."