The Davis Cup will use tie-breaks in the fifth set of matches starting in 2016, the International Tennis Federation (ITF) confirmed.
Leonardo Mayer and Brazilian Joao Souza were involved in the longest ever Davis Cup singles match earlier this year, the Argentine eventually winning in six hours, 42 minutes.
At its annual general meeting on Friday, the ITF confirmed the move to introduce fifth-set tie-breaks starting next year.
It follows the lead of the US Open, which is the only grand slam to have the same rule.
Great Britain and Belgium are in this year’s World Group final, which will be played in Ghent starting November 27.
Also at the meeting, David Haggerty was elected president.