A 3-man International Cricket Council (ICC) anti-corruption tribunal, which deferred a decision after a six-day hearing, last month, began proceedings in Doha at 9:00 am local time (0600 GMT).
The tribunal is headed by Michael Beloff QC, while the other two members are Albie Sachs of South Africa and Sharad Rao of Kenya.
All three cricketers Salman Butt, Mohammad Asif and Mohammad Aamir have already charges in England. They have been formally charged by British prosecutors of taking bribes to fix matches. Mazhar Majeed, the bookmaker, has also been charged.