Aussie tennis great Jelena Dokic has delivered a harsh truth after the tennis world was left horrified by a video of a 14-year-old player being assaulted by her father. The video showed graphic footage of the tennis player being kicked and slapped by the male before being thrown to the ground and kicked repeatedly. Anti-violence advocate Igor Juric posted the video, which had been sent to him by a source, and said he believed the incident was a result of a poor training session. The video quickly drew shock and horror from across the world as tennis stars past and…