Top 10 best ranking Men's volleyball teams as of September 2017:
1 Brazil
2 United States
3 Decrease 1 Poland
4 Steady Italy
5 Russia
6 Canada
7 Argentina
8 Iran
9 France
10 Germany
Top 10 best ranking Women's volleyball teams as of September 2017:
1 China
2 United States
3 Serbia
4 Brazil
5 Russia
6 Japan
7 Italy
8 Netherlands
9 Dominican Republic
10 South Korea
WikipediA link for more info:
https://en.wikipedia.org/wiki/FIVB_World_Rankings