He has been at a Leicester game this season (moreover, this month) – on January 11, he oversaw the Foxes’ unexpected home defeat to Southampton (1-2).
However, Chelsea will visit third placed Leicester City on February 1, a game the Blues must not lose in the race for a top four finish.
The match officials for the game have been confirmed by the Premier League.
According to the Premier League’s official website, Lee Mason will be in charge of Chelsea’s Premier League game against Leicester City on Saturday.
Simon Long and Mark Scholes will be assistant referees, and Oliver Langford will be the fourth official. VAR is Graham Scott, assisted by Andy Halliday.