Reports from Spain have claimed that Chelsea are now leading fellow elite European sides in the race to sign one seriously expensive player. According to El Nacional Catalan, the Blues are now the top contenders to bring in Antonio Silva from Benfica this month. Chelsea have been linked with the signing of a centre-back since the transfer window began, with them perhaps already beginning to plan for future seasons in that role. There are currently no reports that they are going to extend the contract of Thiago Silva, with him set to turn 40 early into next season. This is despite him proving t…