Swingball, ball control, individual (duration)

According to Official Guinness Records,

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.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in Australia.

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Other Australia records that might interest you:

• Most double hundreds in a Test match career (male)
• Most expensive turntable
• Most consecutive AFL Grand Final wins
• Largest island
• Fastest circumnavigation by scheduled flights, visiting six continents (team)