CHELSEA have been dealt a summer transfer blow with the news that Napoli star Dries Mertens is edging closer to signing a new contract with the Serie A club.

The Belgian was the subject of concrete January interest from the West Londoners, but a move failed to materialise.

Blues chiefs were hopeful of landing the diminutive 32-year-old on a free transfer in the summer though, with his current deal set to expire in June.

But according to Sky Sport Italia, Mertens is "edging closer" to agreeing a new deal with Napoli after all.