Nani signs new Manchester United deal
"The coaching staff have taught me so much about the game and I'm playing alongside some of the best players in the world. I'm looking forward to winning many more trophies with this team," the 23-year-old told the club website.
Nani, who joined from Sporting in 2007, will stay at Old Trafford until at least June 2014. The tricky winger has enjoyed his best form so far this season and will be included in Portugal's World Cup squad for the finals in South Africa which start on June 11.