Men's teams:

• Italy - 2nd, lost to Brazil in gold match
• Canada - T-5th, lost to Russia in QFs
• United States - 3rd, beat Russia in bronze match
• Brazil - defending Olympic champions
• France - T-9th, failed to advance past Pool A prelims 
• Argentina - T-5th, lost to Brazil in QFs
• Poland - T-5th, lost to U.S. in QFs
• Russia, as ROC - 4th, lost to U.S. in bronze match
• Iran - T-5th, lost to Italy in QFs 

Women's teams:

• Brazil - T-5th, lost to China in QFs
• Russia, as ROC - T-5th, lost to Serbia in QFs
• South Korea - T-5th, lost to Netherlands in QFs
• Japan - T-5th, lost to U.S. in QFs
• Argentina - failed to advance past Pool A prelims
• United States - 3rd, beat Netherlands in bronze match
• Serbia - 2nd, lost to China in gold match
• China - defending Olympic champions
• Italy - failed to advance past Pool B prelims

Men's teams:

• Mexico - last in Pool E at IOQ, 4th at North American qualifier
• Egypt - 3rd in Pool A at IOQ, 2nd at African qualifier
• Cuba - 3rd in Pool E at IOQ, 2nd at North American qualifier

Women's teams:

• Cameroon - last in Pool D of IOQ, 2nd at African qualifier
• Netherlands - 2nd in Pool F at IOQ, 4th at European qualifier
• Puerto Rico - last in Pool A at IOQ, 2nd at North American qualifier

*IOQ: 2019 Intercontinental Olympic Qualifier

Men's teams:

• Japan - most recently tied for last in 2008; highest placing: gold at the 1972 Munich Games
• Venezuela - most recently T-9th in 2008, its only other Olympic appearance
• Tunisia - most recently tied for last in 2012; highest placing: 9th at the 1984 Los Angeles Games

Women's teams:

• Dominican Republic - most recently T-5th in 2012, its highest placing at the Olympics
• Kenya - most recently tied for last in 2004 and in 2000, its only other Olympic appearances
• Turkey - most recently T-9th in 2012, its only other Olympic appearance

Men's teams:

2018 FIVB Volleyball Men's World Championship (Italy-Bulgaria)

Final: Poland def. Brazil, 3-0
3rd: U.S. def. Serbia, 3-1

2019 FIVB Volleyball Men's World Cup (Japan)

Champions: Brazil (11-0)
2nd: Poland (9-2)
3rd: U.S. (9-2)
4th: Japan (8-3)

Women's teams:

2018 FIVB Volleyball Men's World Championship (Japan)

Final: Serbia def. Italy, 3-2
3rd: China def. Netherlands, 3-0

2019 FIVB Volleyball Men's World Cup (Japan)

Champions: China (11-0)
2nd: U.S. (10-1)
3rd: Russia (8-3)
4th: Brazil (7-4)