Matfield , 37 , who won the 2007 World Cup , retired after playing for the Springboks at the 2011 tournament .
Matfield , 37 , who won the 2007 World Cup , still plays club rugby for Bulls .
Matfield , 37 , who won the 2007 World Cup , retired after playing for the Springboks at the 2011 tournament but still plays club rugby for Bulls .