Transfer interest is building around Oscar Mingueza, with Marseille understood to be weighing-up a move for the Celta Vigo defender. While there has been no official bid as yet, the club may act swiftly if they decide to pursue the deal before the transfer window slams shut. Marseille remain optimistic, but the deal is not without hurdles. Leipzig, Aston Villa and Newcastle continue to monitor developments and could yet re-enter the race if negotiations stall or valuation gaps remain unresolved. Marseille's back line has been a real strength this season, conceding just 0.92 goals per game (11 in 12). Oscar Mingueza would be expected to slot into that unit and hold his own in an already solid setup. No fresh speculation surrounds Celta Vigo or Marseille regarding other transfer targets. Looking for Marseille transfer rumours? Follow us on Twitter @PlayerSwitchCom for more rumours just like this.