Not every nation is moving as quickly as the U.S. Craig Tiley, the head of Tennis Australia's player development and tournament director for the Australian Open, which starts Monday, said he fully expects that private clubs, which run most tournaments for children in Australia, will continue to use a regular ball.

WSJ: Is Tennis Getting Too Soft?

Some other tennis venues, such as those used for the Australian Open have sliding roofs - but that tournament is on hard courts, which react differently to a living surface like grass.

BBC: SPORT | Tennis | The Wimbledon roof debate

Despite the incident resulting in a one-month ban from the International Tennis Federation, a year later Tomic's father was railing at an Australian Open tournament director Craig Tiley so vehemently about the scheduling of one of his son's matches that security had to be placed around the official.

CNN: Family ties bind Tomic as he stands by troubled dad

Despite the incident resulting in a one-month ban from the International Tennis Federation, John was up to old his tricks a year later -- railing at Australian Open tournament director Craig Tiley so vehemently about the scheduling of one of his son's matches that security was ultimately placed around the official.

CNN: Tomic Snr claims self-defense for Drouet clash