The Blues have been heavily criticised for selling Matic to Manchester United for £40m.
The Serbian midfielder has started life superbly well with United, raising many eyebrows as to why Chelsea let him go.
Antonio Conte splashed out to bring Bakayoko to Stamford Bridge from Monaco and he too made an impressive debut in their win at Tottenham on Sunday.
Despite being far from fully fit, the French powerhouse played the full game at Wembley and showed signs he can be a star in the Premier League.
Chelsea: Team average – 7
“His energy levels were bordering on superhuman considering the lack of training”
Chelsea great Pat Nevin on Tiemoue Bakayoko
And Chelsea great Nevin reckons replacing Matic with the far younger Bakayoko will prove to be a great piece of business by Conte and co.
He told the club’s website: “Nemanja Matic has gone and has made a fine start at United, so well done him. He did a great job for this club and we are grateful for that.
“Many were quick to suggest it was a mistake to let him go, but if Tiemoue is as good, he is also crucially six years younger and that counts for a great deal when you are building a squad.
“His energy levels on the day were bordering on superhuman considering the lack of training and match fitness.
“You can only guess at what else he will have to offer in the future when you see him striding away from top players who are many weeks, or even months, ahead of him in their season’s fitness regimes.”
Chelsea beat Spurs thanks to a stunning double from full-back Marcos Alonso.
Conte’s side face another big early-season game when they welcome Everton to Stamford Bridge on Sunday.