Barcelona are considering a January swoop for former Chelsea defender Branislav Ivanovic, Goal understands, as they seek to bolster their backline.
The Spanish giants are unsure if centre-back Samuel Umtiti will be fit to play in the new year following treatment on a knee injury.
As such, they are lining up a move for a defender with the profile of a 'veteran', with Zenit centre-back Ivanovic fitting the bill.
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The ex-Serbia international is 34, and has been with Zenit since 2017, when he joined the Russian club from Chelsea.
A trophy-laden career has seen him win three Premier League titles, three FA Cups, the Champions League and the Europa League, as well as a Russian Cup with Lokomotiv Moscow.