The 24-year-old had last month told the club that he is not planning to extend his current contract.
The controversial psychologist has been publicly criticised for his racist and misogynist view.
Former Southampton player Eamonn Collins held the record for more than four decades.
Discussions took place between the Chelsea hierarchy and Potter’s representatives into Thursday morning.
A goal in the 11th minute of stoppage-time by Antoine Griezmann earned Atletico Madrid a 2-1 home win over 10-man Porto in the Champions League on Wednesday.
Nigeria’s Super Falcons suffered a 4-0 defeat at the hands of their American counterparts.
Haaland has now scored nine goals in the first five games of his Premier League career.
Gabriel Jesus continued his blistering start to life at the Emirates with another goal on the 30th minute.
Mitrovic capitalised on Gabriel’s mistake, firing in Fulham’s first goal in the 54th minute.
