As part of the unbeaten run the Springboks won the Tri Nations Series undefeated and beat several teams by record margins, including a 52–10 against France in Paris, a 68–10 win over Scotland in Edinburgh, a 33–0 defeat of Ireland and a 96–13 against Wales.
The relationship between Mallet and Gary Teichmann, one of South Africa's most successful team captains ever (with 36 wins), began to sour and Teichman was controversially excluded from the 1999 Rugby World Cup squad.
Despite his team's relatively mediocre results of 8 wins and 5 losses in 1999, the Springboks still managed to break more records, beating Italy 101–0 and England in the quarter-final 44–21, with Jannie de Beer kicking a world-record five drop goals in that game.
In 2000, Mallett accused the South Africa Rugby Football Union (SARFU) of "greed" for selling Tri-Nations championship tickets at inflated prices.
[8] He had alienated the SARFU executive, and on 27 September he resigned as national coach at the start of a disciplinary hearing began into allegations that his comments had brought the game into disrepute.
On 3 October 2007, Mallett replaced Frenchman Pierre Berbizier as "CT" ("Technical Commissioner", i.e. coach) of the Italy national rugby union team.
Mallett has stated that he wishes to spend time with his family in South Africa, despite being briefly linked to the position as Coach of England following Martin Johnson's[18] resignation.