 Complete the following phrase:  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 54 Indonesian victory was upheld by the IBF BWF over Danish protest. When the challenge round returned to Jakarta in 