Cheetahs JW Jonker walks from the field after their Super 14 rugby match against the Crusaders in Christchurch March 15, 2008. REUTERS/Simon Baker (NEW ZEALAND) 

Crusaders fullback Leon MacDonald beats the tackle of Cheetahs JW Jonker (L) during their Super 14 rugby match in Christchurch March 15, 2008. REUTERS/Simon Baker (NEW ZEALAND) 

Sitiveni Sivivatu of the Chiefs (2nd L) upends JW Jonker of the Cheetahs during the Super 14 rugby match at Waikato Stadium in Hamilton March 8, 2008. REUTERS/Nigel Marple (NEW ZEALAND) 

Sitiveni Sivivatu of the Chiefs (R) upends JW Jonker of the Cheetahs during the Super 14 rugby match at Waikato Stadium in Hamilton March 8, 2008. REUTERS/Nigel Marple (NEW ZEALAND)