Rudy Hartono
Amid some complaints of home court advantage (and "home climate" advantage as far as the Europeans were concerned), a rules change effective in 1964 prevented the reigning champion nation from defending the Cup at home twice in succession. The challenge round played in Tokyo, Japan that year was nonetheless controversial because the Danish challengers were barracked and severely harassed during play by young Indonesian fans. A narrow 5–4 Indonesian victory was upheld by the IBF (BWF) over Danish protest. When the challenge round returned to Jakarta in 1967 a resurgent Malaysia led Indonesia 4–3 (despite the spectacular debut of Indonesia's young Rudy Hartono) when crowd interference during the eighth match prompted tournament referee Herbert Scheele to halt play. When Indonesia rejected an IBF (BWF) decision to resume the contest in New Zealand, Malaysia was awarded the outstanding matches (6–3) and with them the Thomas Cup.