Going into the last set of group fixtures in the women's football tournament, Canada, hosts Brazil and reigning champions USA have already sealed their place in the knockout stages. On Tuesday, nine more teams will go into the games with the hope of joining them, in their continued hunt for an Olympic medal.
Over in Brasilia, Canada takes on Germany at the Estadio Nacional Mane Garrincha, and no one is quite sure what to expect.
On paper, Silvia Neid's Germany team will begin as favourites, but after their 2-2 draw against Australia, where they had to come back from two goals down, the jury is out on the 2015 FIFA World Cup semi-finalists.