WATCH LIVE: Day 1 water polo includes Serbia-Hungary, USA-Croatia

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Water polo takes its Olympic bows for 2016 when Serbia and Hungary kickstart a six-match day with an 8 a.m. start from Brazil.

Serbia is favored by many to pick up gold, but its former coach will hope to spring a major upset as the leader of the United States. The Yanks will take on Croatia at 9:20 a.m. EDT.

WATCH LIVE: Serbia vs. Hungary — 8 a.m. EDT

United States vs. Croatia — 9:20 a.m. EDT

Spain vs. Italy — 10:40 a.m. EDT

Greece vs. Japan — Noon EDT

France vs. Montenegro — 6:30 p.m. EDT

Brazil vs. Australia — 7:50 p.m. EDT

The U.S. is in a group with Spain, France, Montenegro, Italy and Croatia, and will need to finish Top Four to advance to the knockout rounds.