Chelsea are currently enduring a fairly unsuccessful season under Maurizio Sarri.
The Blues sit 6th in the Premier League and have failed to win either the League Cup or the FA Cup.
They remain in the Europa League, though, which could yet prove a way of salvaging this season.
If Chelsea are able to get the summer window, despite their ban, they could look to strengthen their defence.
Here are some centre-backs they could target…
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