Chelsea captain John Terry believes that Arsenal's decision to sell Patrick Vieira to Juventus may harm their Premiership title chances.
Vieira ended a nine-year spell at Highbury by moving to Italy and Terry believes it is a big blow for Arsenal.
"Vieira is a world-class player and is obviously going to be a big miss - if you took one of our main midfielders out we would be the same," said Terry.
"They have got some great players but initially they will really miss him."
Terry, speaking ahead of the Community Shield tie between the two clubs on Sunday, says that none of the current Chelsea players would want to quit Stamford Bridge.
He added: "No-one wants to leave Chelsea, it's the place to be.
"We all want to win things but, more importantly, we want to win things with Chelsea.
"We didn't beat Arsenal last year, despite winning the title. In fact, it has been a few years since we have beaten them in the league.
"So it would be nice to get a win under our belt in the Community Shield."
Terry had a foot operation at the end of last season, but his performances on Chelsea's pre-season trip to America showed that he is making good progress in his comeback.
"I felt really sharp, read the game well and felt the best I have so far,"
said the 24-year-old England defender.
"My back was a little bit stiff, and that is why I came off.
"I wanted to get 90 minutes under my belt, but the manager thought it was best to take me off against DC United.
"Overall, though, I felt good and that recovery period between runs is now
getting shorter and shorter."