Chelsea and Manchester United are set to fight it out for the services of Sevilla left back Alberto Moreno. The 21-year-old, who is also being courted by Real Madrid, is eligible to play in the Champions League this term and is considered as the long-term successor to England star Ashley Cole at Stamford Bridge. The London club sent European scout Mick Doherty to run the rule over Moreno in recent weeks and could launch a January bid expected to be in excess of £20million. Moreno's buy-out clause is £25m. Chelsea boss Jose Mourinho is a keen admirer of Moreno, who recently made his debut for the Spanish national team, but the Portuguese could also move for Southampton defender Luke Shaw. United and Madrid have both sent scouts to watch Moreno this season with Old Trafford boss David Moyes also keeping tabs on Fabio Coentrao. United ran out of time to complete a season-long loan deal for Coentrao in the last window but have revived their interest and are ready to explore the possibility of signing him on a permanent basis. Left-back remains a priority position for Moyes, with Patrice Evra running down his contract and Alexander Buttner failing to convince that he can step up from squad player, and the United manager is gradually whittling down the list of candidates.