Sri Lanka's Muttiah Muralitharan, India’s Harbhajan Singh, R Ashwin and Pakistan's Saeed Ajmal are some of the greatest off-spinners to have ever played the game of cricket but former India opener Gautam Gambhir feels legendary spin wizard Saqlain Mushtaq was a class apart and according to the former India opener Pakistani is the greatest off-spinner. Gambhir, who over a 13-year-long international career came across many spin maestros, said that the way Mushtaq's deliveries came off-the-wicket, it made life very difficult for the batters.