Flanker Deon Stegmann has been ruled out of the rest of the Bulls Super Rugby tour of New Zealand after he broke his arm in the Bulls 24-27 victory over the Waratahs.

Stegmann came off the field in Sydney holding his arm and scans have revealed a broken arm which will rule him out for six weeks.

Stegmann will return to South Africa and he will be replaced by Dewald Potgieter, who has been declared fit following a hamstring strain.

Potgieter and Dean Greyling will fly to New Zealand on Saturday, where the Bulls play the Highlanders.

Greyling was on maternity leave after his wife gave birth on Monday and will again join up with the team on Sunday.