Qualification for the men's singles was primarily through the ATP ranking list of 11 June 2016. An additional restriction was that players had to have been part of a nominated team for three
Davis Cup events between 2013 and 2016 (with some exceptions). Nations had been able to enter four players (two pairs) in the event since the 2004 Games. Each nation was limited to a total of 6 male players in the singles and doubles events combined, so nations with 4 singles players could add only 2 more in doubles. The men's doubles draw was 32 pairs (64 players). Doubles players ranked 10 or better qualified directly and could bring any ranked singles or doubles player from their nation as their partner. This resulted in 6 pairs being filled, as 2 pairs consisted of both players in the top 10 and the Bryan brothers declined to use their qualification places. The draw was then filled to 24 pairs (that is, 18 new pairs) through combined ranking. The better of a player's singles or doubles ranking was used, and the two rankings of a pair of players were added to give a combined ranking, with the lowest rankings earning qualifying spots. (For example,
Rafael Nadal was ranked #4 in singles and #144 in doubles and
Marc López had no singles ranking and was ranked #18 in doubles; they had a combined ranking of 22, earning the first quota spot through this method.) The final 8 pairs were selected by the ITF considering both combined ranking (as above) as well as continental and national representation, including host nation places if not qualified (bringing the total number of male tennis players to 86). ==Competition format==