They surpassed the previous record of 263-5, set by Royal Challengers Bangalore in 2013
Chelsea, who are currently ninth in the Premier League table, have endured a turbulent season and will miss out on Champions League football next season, sparking speculation that a number of players could leave the club.
Courtois, however, has underlined his commitment to Chelsea's cause, and announced his intention to stay put.
"I have never had any contact with PSG," the 23-year-old told Le Parisien.
"I like playing in England. Paris is a very good club but I am happy at Chelsea.
"I have a contract for three years, so I will say 100 percent (I will stay). Rumours affect any club where things are going badly. People think the top players want to leave because they are not in the Champions League."