Chelsea are eyeing RB Leipzig centre-back Castello Lukeba.
Lukeba, 21, left France's Lyon for Germany's RB Leipzig last summer.
Foot Mercato says Chelsea are showing interest in the 21-year-old ahead of the summer market.
The London giants have made an inquiry for Lukeba, who has a €70m buyout clause.
Manchester United have also followed Lukeba in recent weeks, but Chelsea's interest is more concrete.
