Chelsea were forced to deny claims made by talkSPORT pundit Stan Collymore, who suggested that John Terry and Diego Costa had clashed at the club's Cobham training ground.
The former Liverpool star eventually withdrew his claim and apologised for making what is now believed to be a false accusation.
But the fact that Chelsea were so quick to deny it points to a growing sense of vulnerability at the club.
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Indeed, a report in the Daily Mail claims that morale within the team is so low that several first-team stars already believe they have blown their chances of defending the Premier League title.
Manchester City's perfect start to the season has left Chelsea trailing by 11 points. They currently sit in 17th position and another defeat will inevitably place Jose Mourinho's immediate future in doubt.
Back on track
The Blues have a chance to get back to winning ways when their Champions League campaign gets underway with a game against Israeli side Maccabi Tel Aviv at Stamford Bridge.
But they will then host Arsenal in the same stadium on Saturday in what could prove to be a tough challenge. Mourinho has a fantastic record against Arsene Wenger but lost his first game to the Frenchman in their last encounter; the Community Shield.
Cause for concern
While Costa and Terry did not have a bust-up on the training ground, there is still significant cause for concern with regards to the Brazilian striker.
Scoring just one goal this season, reports from yesterday's Daily Mail claimed that Mourinho was growing fed up with Costa's inability to reach peak form.
Rumours of loud house parties and whistlestop tours of Ibiza have left many wondering if the temperamental striker has lost his desire to play football at the highest level.
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