Chelsea have enquired about the possibility of signing Real Madrid defender Achraf Hakimi.
Hakimi, who can play on either side of the defence but is usually deployed at right-back, has impressed while on loan at Borussia Dortmund.
As reported by The Mirror, Chelsea boss Frank Lampard sees the 21-year-old as an excellent option to bolster his defensive resources.
Cesar Azpilicueta is useful at either right-back or left-back but Hakimi would represent a more long term option.
Chelsea also have Marcos Alonso and Emerson to call upon at left-back but the Blues could also do with an upgrade in that department.