Chelsea are being linked with Marseille’s Florian Thauvin.
It comes after one of the Blues’ scouts watched Marseille play Monaco on Sunday.
Leboeuf is quoted as saying: “Thauvin didn’t exist for an hour.
“There was one moment where he had the ball and he tried to knock it past the defender and go round the other side, and you wonder where he’s going.
“Wait for your team-mates to arrive – keep the ball. Football isn’t played with 11 balls.”
Meanwhile, Italian media are reporting the fact that Sampdoria turned down the chance to sign Julio Cesar from QPR, having previously tipped him to join the Genoa-based club.
Rangers have so far been unable to find any takers for the Brazil goalkeeper, who has been available since the end of last season.