Real Madrid and Barcelona are considering a move for Chelsea defender David Luiz.

The Brazilian could become an early casualty of incoming boss Jose Mourinho who has concerns about the 26-year-old’s defensive abilities.

Luiz cost Chelsea £21million and they will look to make a profit on their 2011 outlay should the interest turn into hardened bids.

Character: Chelsea defender David Luiz signed for £21m from BenficaCharacter: Chelsea defender David Luiz signed for £21m from Benfica

Star: Luiz was an integral part to Chelsea' Europa League triumphStar: Luiz was an integral part to Chelsea’ Europa League triumph

Mourinho wants a new centre-back, a defensive midfielder and at least one striker for his return to Stamford Bridge. Luiz has re-invented himself as a defensive midfielder under Rafa Benitez but remains prone to errors when in defence.

Chelsea have shown interest in Liverpool target Krygiakos Papadopoulos of Schalke but considered the 21-year-old too expensive. Mourinho is a big fan of Real Madrid’s Raphael Varane also but that would prove complicated considering the politics behind Mourinho’s departure from the Bernabeu.

Yet, they are intent on improving their defensive options with Branislav Ivanovic also likely to revert to right-back.

Talent: Madrid's Raphael Varane (heading) has left a significant impact on MourinhoTalent: Madrid’s Raphael Varane (heading) has left a significant impact on Mourinho

Clean sheets: Jose Mourinho's first job at Chelsea would be to strengthen their defenceClean sheets: Jose Mourinho’s first job at Chelsea would be to strengthen their defence

Madrid will overhaul Mourinho’s squad for Carlo Ancelotti. They would rather sell defender Pepe than Varane with Manchester City being offered the chance to sign the Portugal international for £20m.

For their part, Barcelona are struggling to find a centre-back that fits their budget and will be looking to strike a deal for around £25m. Luiz has been on their list for some time but not at the top.

Tough: Mourinho will have to decide on the futures of John Terry and Frank Lampard during next seasonTough: Mourinho will have to decide on the futures of John Terry and Frank Lampard during next season

They wanted Thiago Silva from Paris St Germain but he is too expensive while Manchester City are reluctant to sell Vincent Kompany. Barca have also considered Roma’s teenage defender Marquinhos but he may yet stay another season in Italy.

Arsenal’s Thomas Vermaelen could yet come back into their reckoning but his indifferent end of season form means Luiz is preferred.

Vincent KompanyThiago Silva
 Off limits: Vincent Kompany and Thiago Silva may both be unavailable 
Scouted: But Arsenal sub Thomas Vermaelen is being watched by ChelseaScouted: But Arsenal sub Thomas Vermaelen is being watched by Chelsea