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

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