Nigeria spring historic upset of USA men’s basketball in Olympic tune-up

• Nigeria win 90-87 over heavily favored Americans in Vegas
• Result marks USA's first ever defeat to an African opponent
• USA defeated Nigeria by 83 points at 2012 London Olympics

This is not how USA Basketball expected to open their Olympic summer. Nigeria probably didn't expect it, either.

If there was any expectation of invincibility for the Americans heading into the Tokyo Olympics, it's already gone - after Nigeria shocked the US, 90-87, on Saturday night.