Frank Lampard should "build a side" around Antonio Rudiger, according to Mario Melchiot, who has urged Chelsea to find a worthy "centre-back partner" for the German.
Rudiger has racked up 105 appearances in all competitions for Chelsea since completing a £29 million ($37m) move to Stamford Bridge from Roma in 2017.
Eighteen of those have come in 2019-20 but injuries issues have significantly limited his contribution, forcing Lampard to shuffle his pack.
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Andreas Christensen, Kurt Zouma and Fikayo Tomori have all seen regular playing time in Rudiger's absence, but the Blues' have looked vulnerable at the back throughout their latest campaign, conceding 39 goals in their first 29 fixtures - more than any other top-six club.