The champion has won only once at home in the Premier League this season ahead of Saturday's clash with Aston Villa.
Jose Mourinho admits Chelsea has lost its fear factor at Stamford Bridge.
The Premier League champion has made a poor start to the season, winning only two of its opening eight matches - a run of results that leaves the club in 16th place in the table.
When asked if teams are no longer afraid of playing Chelsea, Mourinho replied: "Maybe. One thing is to go to a stadium where there is a huge percentage of defeats for the away team.