1970 Thomas Cup knockout stage

The veteran Erland Kops, highly critical of the IBF's (BWF's) decision to sustain Indonesia's protest against Thailand, declined to play in further Thomas Cup contests. For reasons less clear, Denmark's top singles player Svend Pri was unavailable. Nevertheless, Malaysia had great difficulty against a group of opponents who seemed to be less affected by the tropical heat and humidity than previous Danish squads had been. Playing first singles for Denmark, the talented Elo Hansen stunned both Tan Aik Huang and "Punch" Gunalan in straight game, while the veteran Henning Borch outlasted Abdul Rahman in the third singles match. Malaysia managed to scrape home 5–4 by taking three of the four doubles matches and both singles against the Danish number two. Gunalan atoned for his loss to Hansen by decisively winning his remaining singles and doubles.

In the other match, Indonesia defeated debutants Canada 9–0. In the first day, Indonesia won the first two singles with Muljadi and Rudy Hartono winning convincingly over Canada's Jamie Paulson and Wayne Macdonnell. In the first doubles, Canada's Dave Charron and Bruce Rollick put up a great fight as they managed to take a game from scratch pair Muljadi and Mintarja. The second doubles saw Rudy Hartono and Indratno defeat Yves Paré and Jamie Paulson in straight sets. In the second day, Darmadi was up against Channarong Ratanaseangsuang who formerly represented Thailand. Channarong took the first game but Darmadi later fought back by winning the next two sets. Muljadi and Rudy Hartono later defeated their Canadian opponents in the singles crossovers. In eight singles games against Rudy Hartono and Muljadi, Canada's Jamie Paulson and Wayne Macdonnell could aggregate only 21 points. Indonesia also won the next two doubles match in two sets.

Malaysia 5	Stadium Negara 30–31 May 1970 [3][4]		Denmark 4
1 2 3 1 Tan Aik Huang Klaus Kaagaard 15 11 6 15 15 12   2 Punch Gunalan Elo Hansen 11 15 10 15     3 Punch Gunalan / Ng Boon Bee Henning Borch / Per Walsøe 15 10 15 4     4 Tan Aik Huang / Tan Aik Mong Tom Bacher / Poul Petersen 17 16 15 10     5 Abdul Rahman Mohamed Henning Borch 15 3 13 18 14 17   6 Tan Aik Huang Elo Hansen 9 15 4 15     7 Punch Gunalan Klaus Kaagaard 8 5 15 0 8   8 Tan Aik Huang / Tan Aik Mong Henning Borch / Per Walsøe 13 18 15 12 11 15   9 Punch Gunalan / Ng Boon Bee Tom Bacher / Poul Petersen 15 5 15 2

Indonesia 9	Stadium Negara 1–2 June 1970 [5][6]		Canada 0
1 2 3 1 Muljadi Jamie Paulson 15 4 15 7     2 Rudy Hartono Wayne Macdonnell 15 4 15 1     3 Mintarja / Muljadi Dave Charron / Bruce Rollick 15 11 12 15 15 11   4 Indra Gunawan / Rudy Hartono Yves Paré / Jamie Paulson 15 8 15 4     5 Darmadi Channarong Ratanaseangsuang 10 15 15 2 15 1   6 Rudy Hartono Jamie Paulson 15 1 15 2     7 Muljadi Wayne Macdonnell 15 1 15 1     8 Indra Gunawan / Rudy Hartono Dave Charron / Bruce Rollick 15 6 15 4     9 Mintarja / Muljadi Yves Paré / Jamie Paulson 15 9 15 10

Malaysia's struggle on its home courts against Denmark had boded badly for its chances against Indonesia, but the relative ease of Indonesia's victory in the final still surprised many observers. Indonesia captured five of the first six matches, including all four at the first two singles positions, to wrest the Cup from Malaysia. Though "Punch" Gunalan was Malaysia's strongest all-around player at this time, he was also (at the comparatively late age of 26) a Thomas Cup rookie, and nerves may have played a role in his tame lead-off loss to the veteran Muljadi. He won the first of his doubles matches with the redoubtable Ng Boon Bee and extended Rudy Hartono to three games in the fifth match of the tie, but the potential three wins which might have been expected from Gunalan's racket did not materialize. Indonesia regained the title by a final score of 7–2, in one of the very few Thomas Cup occasions that a team has had much more difficulty in qualifying for the final set of ties than in winning it. Again, Hartono won all four of his matches.^[7]

Malaysia 2	Stadium Negara 5–6 June 1970 [8][9]		Indonesia 7
1 2 3 1 Punch Gunalan Muljadi 9 15 5 15     2 Abdul Rahman Mohamed Rudy Hartono 12 15 2 15     3 Ng Tat Wai / Tan Aik Huang Indra Gunawan / Rudy Hartono 9 15 11 15     4 Punch Gunalan / Ng Boon Bee Indratno / Mintarja 15 7 13 15 15 10   5 Tan Aik Huang Darmadi 15 12 15 12     6 Abdul Rahman Mohamed Muljadi 5 15 5 15     7 Punch Gunalan Rudy Hartono 16 17 15 12 3 15   8 Punch Gunalan / Ng Boon Bee Indra Gunawan / Rudy Hartono 15 9 16 17 6 15   9 Ng Tat Wai / Tan Aik Huang Indratno / Mintarja 15 10 16 18 10 15