John Hartson insists Cameron Carter Vickers is Celtic key to Champions League success as he urges chiefs 'sign him up'

John Hartson insists Celtic must make sure Cameron Carter-Vickers is their Champions League centre-back.

And the former Parkead striker believes manager Ange Postecoglou may need even more backline provisions.

Hartson believes Carter-Vickers, on loan from Tottenham, has been a huge contributor in Celtic’s run towards regaining the title.

That will secure direct entry to the group stages of the Champions League next season and Hartson says securing a deal for Carter-Vickers should be top of the manager’s to-do list.

The Welshman said: “I speak to people at Spurs and I know for a fact they want to sell Carter-Vickers. He’s been on loan four or five times and they feel he’s not going back to Spurs, so they want to do a deal with somebody.

“You can talk about the forwards, Jota, Liel Abada, Kyogo, whose numbers have been frightening. Joe Hart has been brilliant. But you’ve got to look at Carter-Vickers, he’s been the dominant one. Carl Starfelt has come onto a game, but he’s shown weaknesses and defensive frailties at times.

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“It’s Carter-Vickers who has been that man-mountain alongside him and taken a lot of pressure off him. To do that for your other centre-half, I think he’s been outstanding.