Real Madrid are reportedly monitoring Benfica left back Guilherme Siqueira should Manchester United seal a move for long term target Fabio Coentrao.
The Portuguese international was set to join the David Moyes' side last summer on a season-long loan but the deal collapsed in the final hours of the transfer window as Real failed to sign a replacement.
The Spanish giant had tried to sign Siqueria from Granada to replace Coentrao but although the defender was happy to join Madrid he had already agreed to move to Benfica and the deal did not happen.
Spanish newspaper Mundo Deportivo report that both deals may finally happen during this transfer window as Real Madrid are considering launching a new attempt to sign Siqueira to let Coentrao move to Old Trafford.
Patrice Evra is in the final six months of his contract at United and David Moyes is desperately looking for a consistent replacement for the Frenchman as Alexander Buttner and Fabio da Silva have failed to impress this season.
United have been linked with a number of left-backs recently including Leighton Baines and Luke Shaw but with Everton and Southampton unwilling to sell those players Coentrao has become the preferred choice. Nevertheless, Spanish media report that Real Madrid would only consider selling the player for more than £20m.
Coentrao was out of action from November due to injury and although he is set to return he is going to struggle to secure a place in the line-up with Marcelo now Carlo Ancelotti's first choice in that role. This situation may force the Portuguese to move abroad to improve his chances of making it to the national squad for the World Cup in Brazil.
Furthermore, Coentrao has not featured in the Champions League for Real this season and therefore could also feature in the European competition for United.