The 24-year-old Olympic gold medallist, the current world number three, was thrown out of his last event in Acapulco after smashing his racquet against the umpire's chair.

Zverev was fined $40,000 (£30,000/€36,000) by the Association of Tennis Professionals and admitted his behaviour following a doubles defeat with Brazil's Marcelo Melo was "unacceptable".

He last played in the Davis Cup in 2019 and had previously said he would not appear while the competition has its current format.

Because of his U-turn, he has been selected to play in his country's qualifier against Brazil in Rio de Janeiro.

This is one of 12 matches taking place tomorrow and Saturday (March 5), with all of the winners earning a spot at the 2022 Davis Cup Finals.

Zverev will line-up on the clay at the Olympic Tennis Centre, which was used for Rio 2016, alongside fellow singles player Jan-Lennard Struff.

All of the ties will be best of five with four singles matches and one doubles scheduled.

Spain, the 2019 winners, will host Romania on the clay in Marbella but will be without 21-time Grand Slam champion Rafael Nadal.

They have selected Pablo Carreño Busta and Roberto Bautista Agut as their two singles players.

France, the number two side in the Davis Cup nations rankings, also have a home match and will take on Ecuador on hard courts in Pau.

Arthur Rinderknech and Adrian Mannarino will be the singles players for the host nation.

United States will play Colombia on hard courts in Reno, while Australia are due to entertain Hungary on the same surface in Sydney.

Other matches include Finland v Belgium on hard courts in Helsinki, Netherlands v Canada on clay in The Hague and Slovakia v Italy on a hard surface in Bratislava. 

Norway will welcome Kazakhstan on hard courts in Oslo, Sweden will host Argentina on the same surface in Helsingborg and Argentina will be at home to the Czech Republic on clay in Buenos Aires.

South Korea will line-up on hard courts for a home fixture in Austria.

The 2022 Davis Cup Finals will be the third edition held under the new format for the men's team tennis competition.

Until 2019, a one-off final was staged between two nations, but now 16 countries are invited to the same venue to contest the trophy.

Russia, as defending champions, had been due to receive an automatic spot in this year's Finals which have yet to been allocated a location.

However, the country has now been suspended due to Vladimir Putin's invasion of Ukraine.

Croatia, the runners-up last time, have had their place in the Finals confirmed alongside Serbia and Britain who have been handed wildcards.

The Davis Cup was first contested in 1900.