PERTH, AUSTRALIA - JULY 23: Cesc Fabregas of Chelsea crosses the ball during the international friendly between Chelsea FC and Perth Glory at Optus Stadium on July 23, 2018 in Perth, Australia. (Photo by Paul Kane/Getty Images)

Chelsea boss Maurizio Sarri says that midfielder Cesc Fabregas remains sidelined with a “strange” injury

The Spaniard featured regularly in Chelsea’s pre-season fixtures while several of his teammates recovered from their exploits at the World Cup.

But, after picking up an injury against former club Arsenal in a friendly at Dublin, Fabregas aggravated it in Chelsea’s 2-1 defeat to Manchester City in last month’s Community Shield.

The 31-year-old has since missed all four of the Blues’ Premier League matches.

“Cesc is still out,” said Sarri, according to Football London.

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“Actually, he is working in water. We hope that next week he will be able to work on the pitch, I think.

“I am sure the injury is not serious, but he has pain out of his knee. So it’s a bit strange, but nothing serious.

“The pain is still there, so for him, now, it’s impossible to run on the pitch. He’s only able to run in water.”

Fabregas will now have until September 15 to prove his fitness to Sarri ahead of Chelsea’s next league fixture against Cardiff City.