Lochte 1 – Phelps 0. The biggest rivalry in the pool becomes the top watched moment on the first full day of games at the XXX London Olympiad. The swimming showdown was followed closely by Team USA’s Gymnastics performance. From Jonathan Horton’s dismount during the middle of his routine to John Orozco’s final landing on the Pommel Horse event, Men’s Gymnastics was a highlight of the evening. Closing out the top moments was Michael Phelps’s interview about his loss in the 4x100m Individual Medley that resulted in his first non-medal finish in the past three games and, coming in fifth, China’s first ever Olympic win in swimming by Sun Yang.
| Rank | Top Moment(NBC ET/PT) | Description |
| 1 | 9:37:50 PM | Lochte wins the 4x100m Individual Medley, while Michael Phelps does not medal, coming in 4th |
| 2 | 9:50:02 PM | Jonathan Horton of the US Gymnastics team dismounts the Pommel Horse midway through his routine |
| 3 | 10:02:01 PM | John Orozco’s nails his Pommel Horse routine during the qualifying performance |
| 4 | 9:44:38 PM | Michael Phelp’s interview after his disappointing 4th place finish, his first non-medal finish in the Olympics |
| 5 | 10:34:25 PM | Sun Yang winning the 400m freestyle and becoming the first Chinese to win an Olympic swimming event |
TiVo Second-by-Second Viewership — NBC Olympics Broadcast — July 28, 2012
