Eagle-eyed fans notice 'mistake' on tactics board behind Mauricio Pochettino in picture

A picture of John Terry and Mauricio Pochettino is doing the rounds after Chelsea fans spotted a player that's already left the club on an office tactics board.

It has been a whirlwind week for Poch. The 51-year-old Argentine, who signed a three-year deal with the Premier League club back in May, was pictured arriving at Cobham for the first time on Monday morning.

He soon began working with a small group of players ahead of their US tour, including highly-rated Italian midfielder Cesare Casadei.

Pochettino was soon praised for his 'mentality, ambition and confidence' during an impressive first press conference days later, when he spoke about leaving no stone unturned.

You can watch that press conference in full below.

After a far-from-convincing campaign that saw Thomas Tuchel, Graham Potter, Bruno Saltor and Frank Lampard in charge, the former Spurs boss has a big challenge on his hands.

But many fans are convinced after hearing what he had to say on his current squad.

As he settled into his new home at Cobham, Chelsea legend John Terry decided to pay Pochettino a welcome visit during his first week at the club's training ground.

Terry, who made over 500 appearances for the Blues, posted a picture with the new Chelsea boss with a message saying: "Great to see the gaffer. Great manager and a great man. Good Luck and welcome. We would have been a great CB partnership."

Soon though, a fair few Chelsea supporters noticed that Mason Mount was still very much present on Pochettino's tactics board.

Mount, who recently penned a five-year deal with Manchester United worth a reported £55 million, sparked controversy ahead of his move to Old Trafford when he posted his farewell message.

Here's how fans reacted to the tactics board.

One said: "Tell the gaffer to update his tactics board," while another commented: "Who sees Mount on the training chart behind?"

A third added: "He needs a clear out on that tactics board!"

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In his first press conference as Chelsea manager, Pochettino urged Blues fans to forget about academy product Mount and focus on the future.

“When I talk about the future, it's about the players in the squad,” he said. “He is a Manchester United player now. “I don't know what happened in the past, we need to be focused on our players and move and try to build a nice story.”

Mount, meanwhile, opened up about his move to Old Trafford shortly after arriving.

"It’s never easy leaving the club where you grew up, but Manchester United will provide an exciting new challenge for the next phase of my career," the England international said.

"Having competed against them, I know just how strong a squad it is that I’m joining, and I can’t wait to be part of this group’s drive to win major trophies."

Thoughts on Pochettino's start to life at Chelsea? Are you impressed with what he's had to say?

Let us know in the comments.