More importantly, we know which races to watch when Ryan Lochte and Michael Phelps dive in, and who expects to challenge (more likely finish behind) them.
As expected, Team USA's top two swimmers are set to face off in multiple events—namely the 200-meter individual medley and the 400 IM.
So outside of Phelps, who is most likely to give Lochte a run for gold in each of his four races (he's also in the 200 backstroke and 200 freestyle)?
Here's a look at Lochte's top competition. And yes, that means more on that Phelps-Lochte rivalry that just won't go away.