England's Luke Shaw controls the ball during a team training session at the Tottenham Hotspur training ground in Enfield, north of London, March 3, 2014.
Luke Shaw is Premier League's most sought left-back. Reuters

Manchester United's chances of signing Southampton left-back Luke Shaw have vastly improved as Chelsea switch their attention towards Sevilla's Alberto Moreno, according to the Express.

The two English giants have been linked with moves to sign both Shaw and Moreno over the last few months, as United and Chelsea are keen on signing a talented left back to their roster for the long run.

Patrice Evra's future at Old Trafford remains uncertain and so is Ashley Cole's future at Stamford Bridge. Their contracts are due to expire by the end of the season and are yet to be given an extension by their respective employers.

Shaw has been in impressive form for the Saints this campaign, having featured in 34 league fixtures. The 18-year-old, valued at £30m, is likely to be at the centre of a bidding war between top clubs across the continent.

The Express' report suggests that the Blues' manager Jose Mourinho is not interested in signing Shaw anymore due to his exorbitant price tag. The Portuguese tactician is willing to allow the Red Devils gain the upper hand by switching his focus to £15m-rated Moreno.

The 21-year-old has also been attracting a lot of attention since rising through the ranks at Sevilla. Last summer, he was part of the Spain U21 squad that won the U21 European Championships.

Alberto Moreno
Alberto Moreno (Right) could be the next left-back to break through into the Spain's national team. Reuters

Moreno's performances at the start of the season allowed him to earn two caps for his country's senior team last year. He has been an integral part of the La Liga outfit's starting XI throughout the campaign making over 40 appearances in all competitions.

The Spaniard has played a crucial role in the Europa League, helping Unai Emery's side secure a place in the final against Benfica on 14 May. Moreno could be one of the surprise candidates to be named in the 23-man squad by Vicente del Bosque for the World Cup in Brazil.

Meanwhile, Shaw was named in the PFA Team of the Year and was also nominated for the 2014 PFA Young Player of the Year award, where he came third behind Chelsea's Eden Hazard and Liverpool's Daniel Sturridge.

The youngster's rise to prominence was noticed by the Three Lions' boss Roy Hodgson, tempting the 66-year-old to hand the Saints' starlet his first national team appearance in March.