Interestingly, to further the argument of Hudson-Odoi leaving for the better, one journalist has pointed out a very worrying fact about Chelsea's youth set-up - and it proves the winger needs to go now.
Fabregas, who has won two Premier League titles since joining Chelsea in 2014, has struggled for first-team opportunities under Sarri, making six appearances in the league this season.
Sarri believes Hudson-Odoi has been unaffected by reports over his future.
Hudson-Odoi set up both of Chelsea's goals against Forest. "A very good match". "Sometimes he will be on the bench but I think I can start to consider him on the same level as Willian and Pedro". I have seen him every day in training, he has been really very normal.
Earlier on Monday, Monaco boss Thierry Henry said he regularly speaks to his former Arsenal team-mate but did not confirm whether his club was signing Fabregas.
Nevertheless, an agreement between the two clubs is expected to be reached soon and will depend more on how quickly Chelsea can find a replacement for the Spanish midfielder before the close of the January transfer market.
Max Bielefeld of Sky Sports has reported that the teenager has handed in a transfer request, and that the club will try "everything" to keep the player during this January transfer window.
"Without Cesc we are only five, so we are in trouble".
The 18-year-old had a good match for the Blues as they lost 1-0 to Tottenham in the first leg of their Carabao Cup semi-final on Tuesday night.
Sarri also told Chelsea fans to focus on supporting their team instead of directing chants at Spurs fans in Tuesday's tie.