Manchester United completed the signing of defender Marcos Rojo from Sporting Lisbon for 20 million euros ($27 million) on Wednesday, and sent Nani on loan to the Portuguese club. The 24-year-old Rojo, who played for Argentina in the World Cup final loss to Germany last month and scored earlier in the tournament, signed a five-year contract at Old Trafford. ''The Premier League is the most exciting league in the world and to have the chance to play in it for the world's biggest club is a dream for me,'' Rojo said. ''I am young and am very keen to continue to learn the game, so playing for such an experienced technical coach as Louis van Gaal is a fantastic opportunity for me.'' United's need to strengthen in defense was highlighted Saturday when the team opened the Premier League season with a 2-1 loss to Swansea in Van Gaal's debut as manager. More...