Kevin O'Neill is to return home from the Chiefs' tour of South Africa due to an Achilles tendon injury.
The second row suffered the problem during his side's 19-18 victory over the Sharks on February 13.
O'Neill played in the first half but did not return after the break and will now have scans and a further assessment of the injury when he returns to New Zealand.
Romana Graham will be flown out to South Africa to take O'Neill's place and is due to meet up with the squad in Durban.
Graham has yet to make his Super 14 debut but has played for Waikato in the Air New Zealand Cup.
The Chiefs are staying in Durban to prepare for their game against the Lions in Johannesburg on February 19.