Manchester United have confirmed the signing of Luke Shaw from Southampton.

The 18-year-old has become one of the most expensive teenagers in world football after United agreed to pay an initial £27 million fee, which could rise to £31 million.

The left-back has agreed a four-year contract with the option to extend for a further year, which is similar to the deal agreed by Spanish midfielder Ander Herrera yesterday.

.@LukeShaw3 joins @AnderHerrera8 as an #mufc player. Welcome to the club! Full story: http://t.co/xCBqiqNPmI pic.twitter.com/NR4acNQuNS

— Manchester United (@ManUtd) June 27, 2014

Meanwhile, it is being reported that ex Manchester United and Everton manager David Moyes is in talks with Galatasaray about taking over as manager.

He has reportedly been offered a £4 million per yet deal to join the Istanbul club.

The Scot has previously spoken of an ambition to manager abroad, although he has cited the Bundesliga as a possible destination.

However, if he were to get the job in Turkey, he would replace former Man City boss Roberto Mancini who departed earlier this month.