Barcelona will step up their pursuit of Chelsea defender David Luiz this week.

Sportsmail revealed the Spanish champions' opening offer early last month and despite an initial rebuttal they have maintained their interest. Chelsea have put a price tag of around £45m on the Brazilian but Barca hope to negotiate a figure closer to £35m.

Director of football Andoni Zubizaretta has confirmed a centre-back is their priority although they have other options if Chelsea continue to price Luiz out of a deal.