Chelsea are closing in on an agreement with Spanish club Rayo Vallecano to sign defender Pep Chavarria for £16.3 million, according to reports. The two clubs are said to be nearing a deal for the player, who would move to the Premier League side in the upcoming transfer window. Neither Chelsea nor Rayo Vallecano have officially confirmed the transfer, but negotiations appear to be at an advanced stage. Chavarria, a defender for the La Liga club, has attracted interest from Chelsea as they look to strengthen their back line. The reported fee of £16.3 million would represent a significant investment in the player. Further details of the proposed transfer, including contract length and personal terms, have not yet been disclosed. The move is expected to be completed once the clubs finalise the remaining paperwork and agree on the final terms of the deal.