Chelsea face a battle convincing Dries Mertens to leave Napoli this week.

The Sun says the experienced Belgian striker has been targeted by boss Frank Lampard to ease his goalscoring problems and help push for a top four finish.

But Mertens, 32, maintains he has a personal ambition to achieve first by becoming Napoli's record goalscorer before he leaves.

He currently sits agonisingly close just four short of club legend Marek Hamsik's 122 goals.

Lampard first identified Mertens as a possible addition to his squad back in early December and the Blues have been monitoring the player since.

Mertens is also out of contract at Napoli at the end of this season who have been advised to cash in on their man.