The German international picked up the Golden Boot award from the tournament as his country made their way to the semi-finals in South Africa.
Speaking to Bild, Muller says that Chelsea were ready to bring him to Stamford Bridge after the competition.
“I wasn’t just offered a little after the World Cup – I refused several offers, including one from Chelsea,” he said.
“It’s an honourable club, and it’s not something that’s offered every day, but I didn’t think it was reasonable to make that step at such a young age.
“A change would have been ridiculous after only one year playing as a pro, and at my age you have to play.”
Muller has two goals in the Bundesliga so far this season.
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