Ajax right-back Gregory van der Wiel is interesting Chelsea.
The Daily Express says Blues owner Roman Abramovich is prepared to back manager Carlo Ancelotti by buying a central defender - Bolton's Gary Cahill is a potential target - and a right-back this month.
Van der Wiel has emerged as a top fullback target for Ancelotti.
The Dutchman has admitted this could be his final season at Ajax and he has also been a long-term target for Arsenal boss Arsene Wenger.