Napoli forward Dries Mertens remains an option for Chelsea.
The 32-year-old Belgian is out of contract in the summer and has a number of offers on the table but is interested in a move to London.
Frank Lampard wanted Mertens in January, despite the fact he turns 33 next week, as he can cover a number of positions.
Chelsea's priorities in the window are expected to be a striker, centre back and left back.
Mertens would definitely tick the box for the former, with the veteran on the cusp of being Napoli's all-time record goalscorer.