The World Group play-offs were the main play-offs of 2005 Davis Cup. Winners advanced to the World Group, and loser were relegated in the Zonal Regions I.

Bold indicates team has qualified for the 2006 Davis Cup World Group.

Home team	Score	Visiting team	Location	Venue	Door	Surface
Austria	4–1	Ecuador	Pörtschach	Werzer Arena	Outdoor	Hard
Canada	2–3	Belarus	Toronto	Rexall Centre	Outdoor	Hard
Chile	5–0	Pakistan	Santiago	Estadio Nacional	Outdoor	Clay
Czech Republic	2–3	Germany	Liberec	Tipsport Arena (Liberec)	Indoor	Clay
Italy	2–3	Spain	Torre del Greco	Sporting Club Oplonti	Outdoor	Clay
India	1–3	Sweden	New Delhi	R.K. Khanna Tennis Complex	Outdoor	Grass
Switzerland	5–0	Great Britain	Geneva	Palexpo	Indoor	Clay
Belgium	1–4	United States	Leuven	Sportplaza Leuven	Indoor	Clay

•  Austria,  Belarus,  Chile,  Spain,  Sweden,   Switzerland and  United States will remain in the World Group in 2006.
•  Germany are promoted to the World Group in 2006.
•  Belgium,  Canada,  Ecuador,  Great Britain,  India,  Italy and  Pakistan will remain in Zonal Group I in 2006.
•  Czech Republic are relegated to Zonal Group I in 2006.

Austria 4	Werzer Arena, Pörtschach, Austria[1] 23–25 September 2005 Hard		Ecuador 1
1 2 3 4 5 1 Jürgen Melzer Giovanni Lapentti 6 1 6 0 6 2       2 Stefan Koubek Nicolás Lapentti 7 5 6 4 4 6 65 77 5 7   3 Julian Knowle / Jürgen Melzer Giovanni Lapentti / Nicolás Lapentti 2 6 6 4 6 0 6 3     4 Jürgen Melzer Nicolás Lapentti 7 5 6 4 7 5       5 Stefan Koubek Carlos Avellán 6 3 6 2

Canada 2	Rexall Centre, Toronto, Ontario, Canada[2] 23–25 September 2005 Hard		Belarus 3
1 2 3 4 5 1 Frank Dancevic Vladimir Voltchkov 5 7 6 4 4 6 77 63 6 3   2 Daniel Nestor Max Mirnyi 77 64 5 7 1 2     retired   3 Daniel Nestor / Frédéric Niemeyer Max Mirnyi / Vladimir Voltchkov 7 5 6 2 3 6 78 66     4 Frank Dancevic Max Mirnyi 6 4 3 6 4 6 6 3 4 6   5 Frédéric Niemeyer Vladimir Voltchkov 2 6 77 62 3 6 4 6

Chile 5	Estadio Nacional, Santiago, Chile[3] 23–25 September 2005 Clay		Pakistan 0
1 2 3 4 5 1 Fernando González Aqeel Khan 6 0 6 0 6 1       2 Nicolás Massú Aisam-ul-Haq Qureshi 6 2 77 64 6 1       3 Fernando González / Nicolás Massú Aqeel Khan / Aisam-ul-Haq Qureshi 6 1 6 3 6 0       4 Paul Capdeville Shahzad Khan 6 0 6 1         5 Adrián García Aqeel Khan 6 2 6 4

Czech Republic 2	Tipsport Arena (Liberec), Liberec, Czech Republic[4] 23–25 September 2005 Clay (i)		Germany 3
1 2 3 4 5 1 Tomáš Berdych Tommy Haas 4 6 4 6 6 1 711 69 6 3   2 Tomáš Zíb Nicolas Kiefer 64 77 6 4 4 6 2 6     3 František Čermák / Leoš Friedl Tommy Haas / Alexander Waske 6 4 5 7 2 2 6 6 4 4   4 Tomáš Berdych Nicolas Kiefer 65 77 6 3 2 6 6 4 7 5   5 Tomáš Zíb Tommy Haas 77 63 5 7 2 6 0 6

Italy 2	Sporting Club Oplonti, Torre del Greco, Italy[5] 23–25 September 2005 Clay		Spain 3
1 2 3 4 5 1 Andreas Seppi Juan Carlos Ferrero 5 7 3 6 6 0 6 3 6 2   2 Daniele Bracciali Rafael Nadal 3 6 2 6 1 6       3 Daniele Bracciali / Giorgio Galimberti Rafael Nadal / Feliciano López 4 6 6 4 6 2 4 6 9 7   4 Andreas Seppi Rafael Nadal 1 6 2 6 7 5 4 6     5 Daniele Bracciali Juan Carlos Ferrero 3 6 0 6 3 6

India 1	R.K. Khanna Tennis Complex, New Delhi, India[6] 23–25 September 2005 Grass		Sweden 3
1 2 3 4 5 1 Prakash Amritraj Jonas Björkman 4 6 4 6 4 6       2 Rohan Bopanna Thomas Johansson 63 77 62 77 64 77       3 Mahesh Bhupathi / Leander Paes Simon Aspelin / Jonas Björkman 3 6 6 3 6 4 6 3     4 Prakash Amritraj Thomas Johansson 4 6 3 6 2 6       5 Rohan Bopanna Jonas Björkman           not played

Switzerland 5	Palexpo, Geneva, Switzerland[7] 23–25 September 2005 Clay (i)		Great Britain 0
1 2 3 4 5 1 Roger Federer Alan Mackin 6 0 6 0 6 2       2 Stanislas Wawrinka Andy Murray 6 3 77 65 6 4       3 Yves Allegro / Roger Federer Andy Murray / Greg Rusedski 7 5 2 6 77 61 6 2     4 George Bastl David Sherwood 6 3 6 0         5 Stanislas Wawrinka Alan Mackin 7 5 77 65

Belgium 1	Sportplaza Leuven, Leuven, Belgium[8] 23–25 September 2005 Clay (i)		United States 4
1 2 3 4 5 1 Olivier Rochus James Blake 6 4 7 5 6 1       2 Christophe Rochus Andy Roddick 1 6 2 6 3 6       3 Olivier Rochus / Kristof Vliegen Bob Bryan / Mike Bryan 3 6 77 62 1 6 3 6     4 Olivier Rochus Andy Roddick 77 64 64 77 65 77 6 4 3 3   5 Steve Darcis James Blake 5 7 1 6