Auckland FC captain Jake Brimmer hurt his shoulder in Saturday night’s breath-taking New Zealand Derby.
Auckland broke the deadlock after just 28 seconds at Sky Stadium, where fans were treated to an all-time classic.
It was the second consecutive week the Black Knights lost a captain to injury after regular skipper and Japanese star Sakai suffered a hamstring injury in Round 3.
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Asked about the injury as Auckland maintained their unbeaten record, Brimmer told Sky Sport New Zealand: “We will wait and see.
“It popped out but they popped it back in.
“Obviously international break next week so we will see what happens from there.”