Which court is more narrow , singles or doubles ?
Several players have won gold medals in more than one category in a World Championship ; this includes : Lene Køppen , 1977 , mixed doubles and women 's singles Christian Hadinata , 1980 , men 's doubles and mixed doubles Park Joo - bong , 1985 , men 's doubles and mixed doubles , 1991 , men 's doubles and mixed doubles Han Aiping , 1985 , women 's singles and doubles Ge Fei , 1997 , women 's doubles and mixed doubles Kim Dong - moon , 1999 , men 's doubles and mixed doubles Gao Ling , 2001 , women 's doubles and mixed doubles From 1977 up to 2001 , the medals were usually divided among five countries , namely China , Korea , Denmark , Indonesia , Malaysia .