Manchester United sign Alex Telles, Theo Walcott close to Southampton return

Manchester United have completed the signing of Alex Telles from Porto (Mike Egerton/PA)

Manchester United have completed the signing of Brazil defender Alex Telles from Porto on a four-year contract.

United are understood to have agreed a fee for £13.5million plus £1.8million in potential add-ons with the Portuguese club for the left-back.