When Eric Murray and Hamish Bond jump into their boat in Rio, people won't be asking whether they're going to win, but by how much.
The New Zealand pair hasn't lost a race since 2007, so anything but a third consecutive Olympic gold medal would be a major upset.
Some of their closest competitors have switched events to avoid having to compete against the blond Kiwis, something that has only strengthened their grip on the men's pair.
Here are some of the other things to watch for in the rowing competition.
NO SPLASHING
Water quality is a serious concern in the Rodrigo de Freitas lake, where an Associated Press investigation last year found high levels of viruses.