Michael Phelps spent the day thinking about all the things he's doing for the final time at the pool. It turns out that included one last win over Ryan Lochte.

Phelps finally has a gold all his own at his final Olympics.

Adding to an already unprecedented medal collection, he claimed his first individual victory of the London Games and handed Lochte a double disappointment on his rival's final night in the pool Thursday.

Phelps set the tone right from the start with a dominating butterfly leg to become the first male swimmer to win the same individual event at three straight Olympics in the 200-meter individual medley. He claimed his 20th career medal, and 16th gold, in 1 minute, 54.27 seconds, just off his winning time in Beijing but still good enough for gold, just ahead of Lochte.

When it was done, there wasn't that water-pounding celebration we've seen so many times from Phelps -- just a slight smile as he hung on the lane rope, gazing up at the stands and soaking it all in.

''Going into every call room, I said it's my last semifinal or my last prelim,'' Phelps said, reflecting on a busy day that included a morning swim, then two more races in the evening. ''We're kind of chalking up all the lasts of certain things.''

As he stepped on the medal podium -- yep, that familiar top rung -- Phelps' eyes were glassy and he whispered something to Lochte. Then, staring up at the US flag while the nation anthem played, he bit his lip and seemed to be struggling to hold back the tears.

''Once it's all over, it's going to really hit me emotionally,'' he said. ''I know for my mom it's very emotional. I'm the last Phelps to come through. She's watched my sisters go through the sport and retire.''

Phelps has never been too revealing with his emotions away from the pool.

But, with just two days to go in his swimming career, there's a definite crack in the facade.