Star half back Piri Weepu was a late withdrawl from the Maori All Blacks' team that beat Canada, 40-15 this morning and could miss the rest of the tour.
Coach Colin Cooper says Weepu tweaked a knee during the captain's run forcing half back Jamison Gibson-Park to play the entire match without a specialist back up in the reserves
Gibson-Park scored a brace in the six tries to two victory.
Cooper says Weepu's fitness will be assessed tonight and another scrum half may be called into the squad.
The Maori next play the United States on Sunday.