Barcelona are ready to test Chelsea's resolve with a huge offer for David Luiz.

The Mirror says Barcelona are ready to make a last-ditch effort to buy Chelsea's £40million-rated defender Luiz.

Barcelona are long-term admirers, having had an approach knocked back last summer.

They believe a huge offer may tempt Chelsea, but are unlikely to bid more than £30m.

Barcelona have even used Neymar as their secret weapon, as they hope their newly-signed superstar may be able to tempt national-team colleague Luiz.