11.30pm: New Zealand v Australia (Women's Group G) at Tokyo Stadium
The Football Ferns start their Olympics campaign against Australia, in what may already be a must-win match.
The Ferns were drawn in a difficult group with their transtasman rivals as well as women's football powerhouse United States and Sweden.
With the top two of each of the three groups (Groups E, F and G) and the two best third-placed teams advancing to the quarter-finals stage, the Ferns will be hoping for a result against the Matlidas, a team New Zealand haven't beaten in 29 games since October 1994.
"Being around for so long, I've always wanted to beat Australia, and this is a perfect opportunity for us to do that," said Ferns veteran Ria Percival.
"We're all really happy that we have got them first up, so we can hit the ground running, and hopefully we can get a result from that game which will push us through for the other two pool games."
Football Ferns squad
Goalkeepers: Vic Esson, Erin Nayler, Anna Leat
Defenders: Liz Anton, CJ Bott, Claudia Bunge, Abby Erceg, Anna Green, Meikayla Moore, Ali Riley, Marisa van der Meer
7.30pm: Great Britain v Chile (Sky Sport 6) 8pm: China v Brazil (Sky Sport 5) 8.30pm: Sweden v United States (Sky Sport 8) 10.30pm: Japan v Canada (Sky Sport 6) 11pm: Zambia v Netherlands (Sky Sport 5) 11.30pm: Australia v New Zealand (Sky Sport 8)
How to follow the action
The Herald will have live updates of the Ferns' first match of the competition from 10pm. You can watch the action live on Sky Sport 8, with coverage beginning at 11.20pm.
The softball action will be live on Sky Sport 3 from 11.50am. The rest of the football is also live on Sky Sport throughout the evening.
Every event on Sky can also be watched via streaming on Sky Sport Now or Sky Go.
12pm: United States v Canada 3pm: Mexico v Japan 6pm: Italy v Australia
Men's football
7.30pm: Egypt v Spain 8pm: New Zealand v Republic of Korea 8pm: Mexico v France 8.30pm: Côte d'Ivoire v Saudi Arabia 10.30pm: Argentina v Australia 11pm: Honduras v Romania 11pm: Japan v South Africa 11.30pm: Brazil v Germany