Chelsea boss Frank Lampard is demanding a new striker be signed this week.

The Sun says Lampard is pressuring Blues chiefs to sign a new striker before Friday's transfer deadline.

The former Chelsea star has urged technical director Petr Cech and director Marina Granovskaia to back him in the transfer window.

Lampard feels the west London club must spend to secure a place in the top four this season.

Krzysztof Piatek of AC Milan is a target for the Blues, however, they face competition from Manchester United and Tottenham.

Edinson Cavani is also a target but the PSG's demands are putting the Blues off.

Cavani, who is expected to join Atletico Madrid despite interest from Chelsea and Manchester United, wants around £360,0000-a-week.