South Korea rallies past Japan
Japan stormed out to win the first set against South Korea in the first volleyball match of the Olympics, but they could not hold on.
South Korea came back and won the next three sets by scores of 25-15, 25-17 and 25-21.
Captain Kim Yeon-koung led the way for South Korea with a whopping 28 spikes and 30 points.
Netherlands upsets China in thrilling preliminary
China is pegged as one of the top gold challengers in women's indoor volleyball, but the Netherlands team came to Rio with its own agenda.
Netherlands entered the Olympics ranked No. 11 in the world and claimed the first set with a 25-23 victory, holding its own against China with a whopping 14-2 edge in digs.
China - ranked No. 3 worldwide - pulled away in the second and third sets, winning both by scores of 25-21 and 25-18, but Netherlands refused to go away.
A 25-22 Netherlands victory in set four pushed the match to a fifth and final set.
In a tense fifth set, the Dutch won a crucial challenge to go up 13-12 and wound up winning the match.
"This was really unbelievable, incredible," Netherlands outside hitter Celeste Plak said. "This shows that we can fight if we are down. China is a very strong volleyball country. Our last success was in 1996 in volleyball.
"Now it's our time to let people know we are Holland and we are back now."
Brazil makes quick work of Cameroon
Brazil wasted no time in taking down Cameroon, with the hosts winning all three sets Saturday in the first game of preliminaries.
Brazil - a top contender to take home gold and currently the No. 2 team in the world - dispatched Cameroon - the No. 28 team in the world - by scores of 25-14, 25-21 and 25-13.
The Brazilians landed 45 of their 96 spikes.
The three sets took just over an hour to complete.
Team USA battles through inconsistency for three-set sweep
After a strong start to the Rio Olympics, the U.S. team had to overcome a bout of inconsistency against Puerto Rico Saturday afternoon.
Team USA won easily 25-17 in the first set before pulling out a 25-22 victory in the second set and then sweeping Puerto Rico with a 25-17 win in the third set.
The sweep gives Karch Kiraly's unit three points after the first day of preliminaries.
Russia cruises past Argentina
Argentina was no match for Russia in the opening match of the preliminary round Saturday.
Russia didn't run into much adversity, winning all three sets by scores of 25-13, 25-10 and 25-16.
Entering the Rio Olympics, Russia was ranked No. 4 in the world and Argentina was No. 12.
Russia's scoring was pretty spread out as five players tallied at least eight points with Nataliya Goncharova leading the way with 14 points.