News of Tony Greig's death has shocked thousands in the cricketing world, not least those he played and worked alongside.
* Test captain Michael Clarke in a statement: "I was only speaking with Tony a couple of days ago so news of his passing is absolutely devastating. Tony has a long and decorated history with international cricket both as a player and commentator and cricket will be much poorer for his loss. Personally, he has also been a great mentor for me, providing great advice through the good times and the bad. On behalf of the Australian Cricket Team our thoughts, prayers and wishes are with Greig family at this difficult time."
* Former Australian fast bowler Dennis Lillee: "Tony was a tough opponent who took on all opposition with aggression and a determination to win. We will not forget the way he stirred the viewers in a similar vein to the way he did to opposition teams."
* Greig's wife Vivian said in a statement: "Our family wants to extend our gratitude for the support and condolences we have received and would ask for privacy at this very sad time."
* Former Australia wicketkeeper Adam Gilchrist on Triple M radio: "Horrible, frightening news. It's just such a shock. The cricketing community in particular will be hit very hard by this."
* Channel nine chief executive David Gyngell in a statement: "It's a deeply upsetting time for his family and for everyone associated with Tony at Nine, and indeed for many, many others who came to know and love the man. He's not only been part of our family, but he's had a seat at the head of the table."
* Former Australian pace bowler Glenn McGrath said on Twitter: "My thoughts are with Tony Greig's family today. RIP Tony Greig"
* South Africa-born England player Matt Prior said on Twitter: "Can't believe one of my heroes Tony Greig has passed away. One of the greatest voices in cricket and will be sorely missed."
* Australia coach, South Africa-born Mickey Arthur said on Twitter: "RIP-Tony Greig. A very good man!"
* Pakistan coach and former Australian Test batsman Dav Whatmore said on Twitter: "Just landed in chennai and learnt of Tony Greig's passing. Deepest sympathies to his family. Great man, great career. He will be missed."
* Kerry O'Keeffe, former Australia player, former WSC player, ABC Radio commentator said on Twitter: "Vale Tony Greig..a good man ..a strong man..a trailblazer..a crash hat wearer. Pitch reporters have lost their patron ..summer is poorer."
* Nine News Sydney said on Twitter: "Tony Greig was a huge part of the Nine family, and he's been a larger-than-life, generous and inherently decent man."
* Cricket Australia chairman Wally Edwards said in a statement: "He was a combative on-field rival of Australian cricket but became one of Australian cricket's firmest friends, with his long-running role as a Channel Nine commentator making him an Australian household name."
* Former Australian wicketkeeper Rod Marsh said on ABC: "I don't know as a player whether he was an icon. I think in some ways he'll be remembered more for his commentary in Australia. I don't think that is a bad thing to say about him because he was very special as a commentator. He got the place alive and working, that Channel 9 commentary box. He loved the game and he served the game very well."