Diego Cavalieri was a member of the Brazilian team that won a second title at the 1999 edition of the FIFA Under-17 World Cup in New Zealand. Diego Cavalieri and his Brazilian teammates were drawn in a tricky group ahead of the tournament. They were in Group C alongside Germany, Australia and Mali.
Rubinho and Diego Cavalieri were the only goalkeepers in the Brazil squad according to the goalkeeping requirement for each participating team at the tournament. Rubinho was the starting goalkeeper, while Diego Cavalieri had to settle for a place on the bench throughout the tournament.