The 2009 Davis Cup was the 98th edition of the most important tournament between national teams in men's tennis. Sixteen teams participated in the World Group and more than one hundred other took part in different regional groups. Spain won their fourth Davis Cup trophy, defending the title they had won the previous year. It is the first year that the ITF awarded ATP rankings points to the players competing in the World Group and related play-offs.[1]
The eight losing teams in the World Group first round ties, and eight winners of the Group I second round ties compete in the World Group play-offs.
Chile, 
France, .svg/1280px-Flag_of_Serbia_(2004%E2%80%932010).svg.png){kind=small}
Serbia, 
Sweden and .svg/1280px-Flag_of_Switzerland_(Pantone).svg.png){kind=small}
Switzerland will remain in the World Group in 2010..svg/1280px-Flag_of_Belgium_(civil).svg.png){kind=small}
Belgium, 
Ecuador, and 
India are promoted to the World Group in 2010.
Brazil, 
Italy, 
South Africa, 
Ukraine and 
Uzbekistan will remain in Zonal Group I in 2010.
Austria, 
Netherlands and 
Romania are relegated to Zonal Group I in 2010. Brazil - advanced to World Group play-offs.svg/1280px-Flag_of_Canada_(Pantone).svg.png){kind=small}
Canada
Colombia Ecuador - promoted to World Group in 2010
Peru - relegated to Group II in 2010
Uruguay
Bahamas - relegated to Group III in 2010
Dominican Republic - promoted to Group I in 2010
Guatemala
Jamaica - relegated to Group III in 2010
Mexico.svg/1280px-Flag_of_the_Netherlands_Antilles_(1986%E2%80%932010).svg.png){kind=small}
Netherlands Antilles
Paraguay
Venezuela
Barbados - relegated to Group IV in 2010.svg/1280px-Bandera_de_Bolivia_(Estado).svg.png){kind=small}
Bolivia - promoted to Group II in 2010
Costa Rica
El Salvador - promoted to Group II in 2010
Honduras - relegated to Group IV in 2010
Puerto Rico
Cuba
Aruba - promoted to Group III in 2010
Bermuda - promoted to Group III in 2010
U.S. Virgin Islands
Panama
Trinidad and Tobago.svg/1280px-Flag_of_Australia_(converted).svg.png){kind=small}
Australia
China
Chinese Taipei India - promoted to World Group in 2010
Japan
Kazakhstan
South Korea
Thailand - relegated to Group II in 2010 Uzbekistan - advanced to World Group play-offs
Hong Kong
Indonesia
Kuwait - relegated to Group III in 2010
Malaysia
New Zealand
Oman - relegated to Group III in 2010
Pakistan
Philippines - promoted to Group I in 2010
Iran
Lebanon
Saudi Arabia
Singapore - relegated to Group IV in 2010
Sri Lanka - promoted to Group II in 2010
Syria
Tajikistan - relegated to Group IV in 2010
Bahrain
Bangladesh - promoted to Group III in 2010
Jordan.svg/1280px-Flag_of_Myanmar_(1974%E2%80%932010).svg.png){kind=small}
Myanmar
Qatar
Turkmenistan
United Arab Emirates
Vietnam - promoted to Group III in 2010
Yemen
Macedonia and 
Great Britain relegated to Group II in 2010. Italy, South Africa, Ukraine, and Belgium advance to World Group Play-off.
Algeria - relegated to Group III in 2010
Bulgaria
Cyprus
Denmark
Egypt
Finland - promoted to Group I in 2010
Georgia - relegated to Group III in 2010
Hungary
Ireland
Latvia - promoted to Group I in 2010
Lithuania
Moldova - relegated to Group III in 2010
Monaco
Montenegro - relegated to Group III in 2010
Portugal
Slovenia
Andorra
Bosnia and Herzegovina - promoted to Group II in 2010
Botswana - relegated to Group IV in 2010†
Estonia - promoted to Group II in 2010
Greece
Iceland
Luxembourg
Madagascar
Morocco
Namibia - relegated to Group IV in 2010†
Nigeria
Norway - promoted to Group II in 2010
Rwanda - relegated to Group IV in 2010†
San Marino - relegated to Group IV in 2010†
Tunisia
Turkey - promoted to Group II in 2010† Relegations to Group IV were ultimately not enforced, as Groups III and IV were reorganized into Group III (Europe) and Group III (Africa) for 2010.
Armenia - promoted to Group III in 2010
Cameroon
Ivory Coast - promoted to Group III in 2010
Ghana - promoted to Group III in 2010
Zimbabwe - promoted to Group III in 2010The Davis Cup World Group and World Group Play-Off matches awarded ATP Ranking points from 2009 to 2015.[3]
Only live matches earn points; dead rubbers earn no points. If a player does not compete in the singles of one or more rounds he will receive points from the previous round when playing singles at the next tie. This last rule also applies for playing in doubles matches.[3]
1 A player who wins a singles rubber in the first day of the tie is awarded 5 points, whereas a singles rubber win in tie's last day grants 10 points for a total of 15 available points.[3]
2 For the first round only, any player who competes in a live rubber, without a win, receives 10 ranking points for participation.[3]
3 Team bonus awarded to a singles player who wins 7 live matches in a calendar year and his team wins the competition.[3]
4 Performance bonus awarded to a singles player who wins 8 live matches in a calendar year. In this case, no Team bonus is awarded.[3]
5 Team bonus awarded to an unchanged doubles team who wins 4 matches in a calendar year and his team wins the competition.[3]
