(AP) -- Michael Phelps is master of the medals.

The swimming sensation has set the Olympic record for most medals won, helping the U.S. to the gold medal in the 4x200 meter freestyle relay. That brings his medal haul to 19, including a record 15 gold.

Phelps broke the record held by former Russian gymnast Larrisa Latynina .     

Earlier, Phelps tied the mark when he was edged out for gold by South Africa Chad le Clos (in the 200-meter butterfly.

Allison Schmitt set an Olympic record to win the 200-meter freestyle.

The American was clocked at 1 minute, 53.61 seconds, more than a second better than the old mark. American teenager Missy Franklin finished fourth.

In Olympic basketball it was a good day for Team USA.

Carmelo Anthony and Kevin Love scored 16 points apiece and Kevin Durant added 13 in the Americans' 110-63 victory over Tunisia.

Team USA turned a close game into a blowout with a spectacular second half.

The Americans led by only 13 at halftime and appeared to be going through the motions.

But with their second unit starting thethird quarter, the U.S. outscored Tunisia 39-14 in the period and put on a crowd-pleasing performance on the way to its second straight easy win.

The Americans emphatically claimed their first Olympic gold medal in women's gymnastics since 1996.

The favorites lived up to expectations, collecting 183.596 points to earn a whopping five-point victory over Russia. Romania won the bronze medal.

The Americans emphatically claimed their first Olympic gold medal in women's gymnastics since 1996.

The favorites lived up to expectations, collecting 183.596 points to earn a whopping five-point victory over Russia. Romania won the bronze medal.

The Americans jumped on top on their first rotation with a number of booming vaults to open a 1.7 point lead.

With one rotation to go, the outcome was decided and the U.S. women used their floor exercises like a coronation.

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