India's Rohan Bopanna will play against Serbia in his home town of Bangalore, while Ukraine takes on Belgium in Kiev as September's World Group play-off venues start to be confirmed.
The Indians have chosen an outdoor hard court at the KSLTA Tennis Stadium in the southern city of Bangalore for the visit of 2010 Davis Cup champions Serbia, who could be led by world No. 2 Novak Djokovic.
Ukraine, which is bidding to reach the World Group for the first time after falling in last year's play-offs, has elected to play against Belgium in its capital, Kiev.
Sergiy Stakhovksy and co will take on Belgium on an indoor court on an as-yet-unspecified surface at the Palace of Sports.
The remaining six World Group play-offs have been granted an extension to confirm their venues.
The full list of ties can be found below:
World Group play-offs
India v Serbia - KSLTA Tennis Stadium, Bangalore, India, outdoor hard
Brazil v Spain - Extension granted until 19 May
Israel v Argentina - Extension granted until 19 May
Canada v Colombia - Extension granted until 28 May
USA v Slovak Republic - Extension granted until 2 June
Australia v Uzbekistan - Extension granted until 2 June
Netherlands v Croatia - Extension granted until 19 May
Ukraine v Belgium - Palace of Sports, Kiev, indoor tbc
Americas Zone Group I - 2nd round play-off
Venezuela v Uruguay - Centro Nacional de Tenis, Caracas, outdoor hard
Asia/Oceania Zone Group I - 1st round play-off
Chinese Taipei v Korea, Republic - Kaohsiung Yangming Tennis Courts, Kaohsiung City, outdoor hard
Europe/Africa Zone Group I - 1st round play-off
Romania v Sweden - BNR Arenas, Bucharest, outdoor clay
Latvia v Austria - Extension granted until 29 April
Europe/Africa Zone Group I - 2nd round play-off
Russia v Portugal - Extention granted until 20 May
Americas Zone Group II - 3rd round
Barbados v Mexico - National Tennis Centre, St Michael, outdoor hard
Asia/Oceania Zone Group II - 3rd round
Thailand v Pakistan - National Tennis Centre, Nonthaburi, outdoor hard
Europe/Africa Zone Group II - 3rd round
Bosnia/Herzegovina v Lithuania - Extension granted until 12 May
Denmark v Moldova - Extension granted until 7 May