Juan Mata has added to Chelsea boss Andre Villas-Boas' problems with a fresh injury.

Mata scored Chelsea's goal in their Champions League clash at Napoli but it was a miserable night for the winger as the Italians blasted back to win 3-1.

He is now sweating on scans over a possible broken finger.

Andre Villas-Boas is already without injured captain John Terry for up to eight weeks and the last thing the under-fire manager needs is Mata facing a spell out of action.