Man Utd sign Telles from Porto on deadline day
Telles, 27, has put pen to paper on a four-year contract at Old Trafford.
Sources told ESPN on Sunday that United had agreed a fee around €15 million with Porto for Telles ahead of Monday’s transfer deadline.
The defender ends his four-year spell with Porto where he won two league titles and scored 21 goals in 127 appearances for the club.
United have struggled defensively this season, conceding 11 goals in three Premier League games including the 6-1 defeat at the hands of Jose Mourinho’s Tottenham.