'Our sole aim is to restore public confidence in our sport.' ATP executive chairman Chris Kermode,   January 27. 
'[An approach 10 years ago to throw a match] made me feel terrible because I don't want to be anyhow linked to this kind of thing. Somebody may call it an opportunity. For me, that's an act of unsportsmanship, a crime in sport.' World No.1 Novak Djokovic,   January 21.
'When I'm playing, I can only answer for me. I play very hard, and every player I play seems to play hard.' World No.1 Serena Williams,   January 18.
'It's super serious and it's super important to maintain the integrity of our sport.' Roger Federer,   January 18.
'It's so far away from any of my interests, everything I want to be a part of and the people I want to work with. It has to be true and real. That's just not something I would ever associate myself with.' Maria Sharapova,   January 18.
'All involved in the administration of the Australian Open will not tolerate any deviations from our values and rules at any level.' Tennis Australia CEO Craig Tiley,   January 18.