The Samoa born world heavyweight boxing contender Alex Leapai has cut short an intense sparring session in Sydney as a precaution after straining his neck against giant Romanian Razvan Cojanu.
Leapai was planning to have a further two rounds on Thursday but will instead resume on Friday.
Cojanu was flown in by Leapai's camp specifically to serve as a giant copy of 198cm Ukrainian champion Wladimir Klitschko, who the Australian will fight in Germany on April 27 for the world title.
Leapai's trainer Noel Thornberry says Leapai would have physiotherapy, massage and possibly an ultrasound but was not concerned at all.
The 34 year old Leapai is the first Australian in 106 years to challenge for a unified world heavyweight title.
He and Klitschko will fight for the WBA, IBF, WBO, IBO and The Ring Heavyweight Championship in Oberhausen, Germany.