Celtic have joined the race to sign French defender Harold Moukoudi, according to the Scottish Sun on Sunday.
The 20-year-old is understood to be available for a fee of around £5 million from Ligue 2 side Le Havre.
Also in the hunt for Moukoudi are Sevilla, West Ham and Burnley, while Middlesbrough are also said to be monitoring the player’s situation.
Brendan Rodgers has made signing a new centre-back his top priority after defensive miscues cost Celtic a place in the Champions League.
Earlier this week, a £3.5 million offer for Scott McKenna was rejected by Aberdeen.