The Mauricio Pochettino era at Stamford Bridge is well and truly underway and the new Chelsea boss stirred the pot with his comments on his first day in the job.

While fans of Premier League football are engulfed in the comings and goings of the summer transfer window, several supporters are curious to know when pre-season begins for their beloved teams.

Pochettino's Chelsea era begins

The Argentine tactician arrived Cobham, the club's training base, for the first time on Monday as he hopes to live up to the task of turning things around.

The Blues had a torrid time last season, finishing 12th on the back of 16 league defeats and seeing two capable managers in Thomas Tuchel and Graham Potter sacked for their troubles.

READ MORE: Richest footballers in the world

The former Spurs boss stirred up fans of his former club and other rival fans with his comments on Chelsea's greatness in the English game.

"I think it’s important to continue a culture of winning. In the last 10, 12, 15 years, Chelsea is the greatest team in England," Pochettino said on of the importance of the club's history.

Here are some tweets from rival fans who seem to disagree with the new Chelsea boss.

The Chelsea boss must now back his words with action and return the Blues to winning ways after a largely forgettable season.

Pochettino plans showdown talks with Chelsea star before making final decision