- من
- William Henderson, Alexander Hogstrom
- ماذا
- 7/35 hour(s), minute(s), second(s)
- أين
- أستراليا (Federation Square,Melbourne)
The longest swingball marathon is 7 hr 35 min set simultaneously by William Henderson (Australia) and
Alexander Hogstrom (Sweden). The attempt was organised by Tennis Australia and held at Federation Square in Melbourne, Australia, on 29 January 2008.
