The transfer mill is churning once again, with Real Madrid believed to be lining up a move for Alex Grimaldo, the defender from Leverkusen. Sources close to the club suggest they are exploring options to reinforce their squad ahead of the run-in. Until a fee and conditions are finalised, the deal remains vulnerable to disruption - especially if Barcelona and Bayern Munich decide to make a formal offer of their own in the coming days. Real Madrid's back line has been a real strength this season, conceding just 0.83 goals per game (10 in 12). Alex Grimaldo would be expected to slot into that unit and hold his own in an already solid setup. Reports suggest Real Madrid are monitoring Yan Diomande, Dominik Szoboszlai and Sandro Tonali whereas Leverkusen have not been associated with other players at this stage. Follow us on Twitter @PlayerSwitchCom and get the latest Real Madrid transfer news and rumours direct to your feed.