Chelsea is taking a risk by selling Nemanja Matic to Manchester United, according to Mark Bosnich.
The Serbian signed for United on Monday after the clubs agreed a fee of £40m.
And Bosnich, who played for both teams in his career, believes the Blues could jeopardize their own title aspirations by selling to a rival, just like Leeds did when they sold Eric Cantona to Manchester United in 1992.
The enigmatic Frenchman helped Leeds to the 1991/92 title, only for the Yorkshire club to sell him to the Red Devils, who won the title with Cantona in the following season.
“I wouldn’t say it’s crazy but it’s a risk and we have seen that,” the Australian said.
“It can go all the way back to Eric Cantona being sold by Leeds to Manchester United, which completely swung them around way back when the Premier League started.
“I always think the club that’s selling has the inside track in terms of fitness and things like that.
“The bottom line remains if the player does want to leave, if he wants to reunite with Jose Mourinho, there’s no use keeping a player in the dressing room that is unhappy.”