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It is hard, no scratch that, it is near impossible to ever say that someone who won 21 career medals, 17 of them gold, could ever be considered as having a performance that fell under expectations.
Meaning no disrespect at all to the legend that has become Michael Phelps, but this was not the Olympic Games that he had envisioned.
Phelps—who came into these Olympic Games needing just two medals of any color to become the most medaled Olympian of all-time—started these Games on a bit of a sour note.
In the 400-meter IM, Phelps' first of seven events, he failed to medal, finishing fourth and behind Ryan Lochte.
For Phelps, it wasn't so much losing to Lochte that provided the biggest shock, but rather that he didn't medal.
The last time Phelps' failed to medal in an Olympic event was in 2000, when he was in just one event and was just 15 years old.
In this day and age, post-Phelps' eight-for-eight gold phenomena, it is a near impossibility to think that an event would ever go by that would see Phelps off of the podium, but this was exactly the case.
For that reason, even though the 400-meter IM was not one of his best events, he was the two-time defending Olympic champion, and it was a disappointment for him not to medal.
After this event, Phelps went on to collect a silver in the 4x100 free relay and a gold in the 4x200 freestyle relay, ultimately giving him his 19th medal and cementing his standing as best of all-time.
In between these two events however, was the 200-meter butterfly, an event that Phelps had never lost in international competition since he won the world title in 2003.
He was the clear favorite going in but in the last few seconds of the race, he was out-touched by one of his greatest admirers, South African Chad le Clos.
Although he claimed the silver medal, he was not happy that he relinquished the lead. As far as silvers go, this was probably the most disappointed you will ever someone who just won one.