See main article: 2020–21 Davis Cup.
The Asia/Oceania Zone was the unique zone within Group 4 of the regional Davis Cup competition in 2021. The zone's competition was held in round robin format in Isa Town, Bahrain, from 18 to 23 October 2021.
Date: 18–23 October 2021
Location: Bahrain Tennis Federation Courts, Isa Town, Bahrain (hard)
Format: Round-robin basis. Three pools of four teams. The top two nations in each pool will play-off to determine which three nations are promoted to Asia/Oceania Group III in 2022.
| Pot | Nation | Rank1 | Seed |
|---|---|---|---|
| 1 | 115 | 1 | |
| 116 | 2 | ||
| 117 | 3 | ||
| 2 | 118 | 4 | |
| 119 | 5 | ||
| 120 | 6 | ||
| 3 | 121 | 7 | |
| 124 | 8 | ||
| 125 | 9 | ||
| 4 | 129 | 10 | |
| 130 | 11 | ||
| 135 | 12 |
Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-team ties, head-to-head records; 4. in three-team ties, (a) percentage of sets won (head-to-head records if two teams remain tied), then (b) percentage of games won (head-to-head records if two teams remain tied), then (c) Davis Cup rankings.
| Placing | Team 1 | Score | Team 2 | |
|---|---|---|---|---|
| Promotional | 2–1 | |||
| Promotional | 1–2 | |||
| Promotional | 3–0 | |||
| 7th–12th | 3–0 | |||
| 7th–12th | 0–3 | |||
| 7th–12th | 2–1 |