UEFA do n't have specific guidelines for incidents of crowding the referee . Comment: Chelsea had nine players surround referee Bjorn Kuipers pressuring him to send off PSG 's Zlatan Ibrahimovic at Stamford Bridge on Wednesday .
UEFA do n't have specific guidelines for incidents of crowding the referee . The FA have the power to fine clubs if they are guilty of mass confrontation or intimidating the match officials . Chelsea had nine players surround referee Bjorn Kuipers pressuring him to send off PSG 's Zlatan Ibrahimovic at Stamford Bridge on Wednesday .