The Football Association has confirmed it is looking into a complaint that Chelsea manager Jose Mourinho used abusive language toward club doctor Eva Carneiro during an incident in the opening 2-2 draw with Swansea last month.
According to a report in the Independent, the FA's compliance department is studying video evidence that Mourinho used abusive and sexist language toward Carneiro as part of a complaint filed after the match on Aug. 8.
The Chelsea manager could face a five-match touchline ban if found guilty of improper conduct.
"The FA has received an enquiry relating to an alleged incident during the Premier League fixture between Swansea v Chelsea on 8 August, and will make no further comment at this time," read a statement.
The 52-year-old was upset with Carneiro and head physiotherapist Jon Fearn for entering the field of play during the 2-2 draw.
According to a source, the complaint received by the FA claims Mourinho's swearing was directed toward Carneiro after she followed Fearn on to the field to treat Eden Hazard.
Chelsea had already had Thibaut Courtois sent off and Mourinho was frustrated to be reduced to nine men as any player receiving treatment has to leave the field of play before returning.
Meanwhile, reports of Carneiro and Fearn returning to the Chelsea bench are reported to be premature.
Chelsea will not comment on an internal staffing matter, but Carneiro has not reported for duty since her reprimand, while Fearn has continued to work.
The Blues play Arsenal at Stamford Bridge on Saturday and it is expected the staff on the bench will be unchanged.