Rafael has signed a new four-year deal with Manchester United which will keep the Brazilian full-back at Old Trafford until the end of the 2015-16 season, the English Premier League club said on Monday. Rafael, 21, arrived at Old Trafford in the summer of 2008 and his performances for the first team have seen him called into the full Brazil squad. “Rafael is one of the club’s brightest young prospects; he has no fear of playing and has great belief in himself,” United manager Sir Alex Ferguson told the club’s website. “The boy has developed immensely since joining United, his energy and enthusiasm are a joy to watch. “Rafael has all the attributes to become one of the best full-backs in the world and I am delighted he has signed a new contract.”