A number of claims were made by both parties on day one before the case was adjourned until 2pm on Tuesday.
Here’s what we know after the first day of the case.
Mourinho admits using ‘son of a b****’
Jose Mourinho admitted using Portuguese term ‘filho da puta’ meaning ‘son of a b**** or whore’, but that he had been using it throughout the match in question against Swansea.
Mourinho had been annoyed by Carneiro entering the field of play to treat Eden Hazard, momentarily leaving the Blues with only nine men.
He said: “Filho da puta is a phrase I often use, all of the players know it. There is no sexist connotation in the use of the phrase – it is just like saying ‘f*** off’.
“In the world of football, a lot of swear words are used.”
Referring to footage of earlier on in the August 8 match, the former Chelsea manager highlighted that he had also been using the term then.
He added that Cesc Fabregas had also used the Spanish equivalent of the term when a Chelsea player was fouled during the game.
In his statement, Mourinho said: “Cesc and I both speak English well, but in the heat of the game we both swear in our mother language.
“Eva was not on the pitch at that point in time.”
But Carneiro alleges he used a different term
However, Dr Carneiro alleges that Mourinho used the term “Filha da puta”, meaning “daughter of a bitch or whore”.
Mary O’Rourke, who is representing Carneiro, said: “He uses the word ‘filha’ because he is abusing a woman.”
She added that Dr Carneiro heard the term “clearly from behind her” as she ran on to the pitch.
Mourinho suggested I work with Chelsea ladies, Carneiro alleged
It has also been claimed in the tribunal that Carneiro was banished to work with either the academy or Chelsea women’s team by Mourinho.
On August 10, Mourinho allegedly told Steve Atkins, head of communications and PR at Chelsea, that he did not want Dr Carneiro on the bench the next match, adding: “She works in academy team or ladys (sic) team not with me”.
Carneiro ‘had to endure sexually explicit remarks’
Carneiro also claimed she had to endure ‘sexually explicit’ remarks from colleagues.
It has also been claimed in the tribunal that Carneiro was banished to work with the junior Chelsea women’s team by Mourinho and had to endure ‘sexually explicit’ remarks from colleagues.
Marina Granovskaia, a close advisor to Roman Abramovic and director who deals with transfers at Stamford Bridge, texted Carneiro saying: “People who know, know you did nothing wrong,” the tribunal heard.
O’Rourke added: “Despite Dr Eva Carneiro’s success at the club, there were a number of issues that arose during her employment.
“These included a lack of action by Chelsea following sexually explicit chanting at/about her at various away games, in particularly Manchester United and West Ham; a lack of female changing/shower/locker facilities, despite these being available to all other male backroom staff; a failure to provide her with a club suit; and regular sexually explicit comments from colleagues.
“Despite this, she continued to work for Chelsea because the role in which she was employed was her dream job.”
Carneiro ‘rejected £1.2milion settlement’
It was also claimed that Carneiro was offered some £1.2million to settle outside of the tribunal but it was rejected.
Chelsea also alleged that she demanded 40 per cent increase on he £285,000 salary to return to work as first-team doctor.
A skeleton argument submitted to the tribunal on behalf of Chelsea and Mourinho stated: “The respondents have taken these steps only because they believe that it is in no-one’s interests that this dispute should be determined through litigation.
“They are conscious that, whatever the facts of the matter, it is likely to be widely and incorrectly assumed that they could have avoided this coming tribunal.”
Will Chelsea continue to support Mourinho now he is at a rival club?
Private hearings in January and February took place without a resolution and but the case will now proceed to the tribunal.
Witness statements and documents – including texts and emails – would likely be made public, while Carneiro, Mourinho and representatives from Chelsea could be called to appear as witnesses.
It could overshadow the start of Mourinho’s employment at Old Trafford after he was named Louis van Gaal’s successor on May 27.
Chelsea have declined to comment on the case, but supported Mourinho even after his employment as manager was terminated.
Whether or not Chelsea will continue to support Mourinho now he is employed by a rival club is unclear.
The case, which is anticipated to be heard over seven to 10 days until June 24, opened at Croydon Employment Tribunal in south London on Monday, but could be settled at any time.
All three parties must agree to a settlement for the tribunal, which would be accessible to the public and the media, to be averted.