Manchester United and Chelsea have been watching RB Leipzig defender Castello Lukeba this season.
Foot Mercato says he is being closely followed by United, while Chelsea have enquired about him in recent days.
The France international can leave Leipzig in 2025 for €70m courtesy of a buyout clause.
Lukeba moved to RBL last summer from Lyon.
The 21 year-old defender has a deal with RBL to 2028.
