The betting business including online gambling sites (judi online) has always raised controversies throughout the world. The tennis betting scandal raised more eyebrows when a systematic betting manipulation had been revealed. The investigation into the systematic manipulation of betting by mafia groups in tennis continues. Upon request, the tennis player admitted the procedure but did not want to comment publicly. The research shows that a professional from the top 30 in the world rankings is said to be involved in the betting scandal. He has already won several ATP tournaments. Around 135 players worldwide are now involved. Investigations have spanned …