Jose Mourinho has claimed that a "clear mistake" from the officials condemned Chelsea to defeat as Bournemouth earned a 1-0 win at Stamford Bridge.
Glenn Murray came off the bench to score a late winner for the visitors, but he appeared to be in an offside position beyond Thibaut Courtois with only one defender between the striker and the goal.
It led to an eighth Premier League loss of the season for the champions, and Mourinho was quick to reveal his frustration with other decisions after Chelsea were denied a penalty when Diego Costa's cross struck a sliding Simon Francis on the arm.
"We didn't deserve to lose. Our opponent - in the period that they thought only of defence - managed to get a goal and there was a clear mistake from the referee," Mourinho told Sky Sports.
"I think it is a clear handball and penalty with the score at 0-0. In the first half we were not aggressive enough, in the second half we arrived in dangerous positions a lot of time with a lot of crosses from the right hand side from Ivanovic.
"They played in a way that some call intelligent, some say is not fair play. They were taking time, calling for the medical department and drinking water like it is basketball time out."
The defeat leaves Chelsea occupying 14th spot in the table.
