"The match referees have to go through ICC guidelines. Ganguly was already warned a couple of times. In the previous match also, he was fined. But I think the six-match ban is harsh," said Viswanath, who is in Kolkata for a two-day coaching session at the eastern zonal cricket academy.
While stating that the same offense of slow over rate committed by the Indian team in the third ODI against Pakistan might have had a bearing on match referee Chris Broads decision after the fourth ODI, Viswanath said if he were in Broads place, "probably I would have given a four-match ban."
Ganguly was banned for six One-day matches for his team's slow over rate in the fourth ODI against Pakistan in Ahmedabad.
He was also fined 70 per cent of match fees for a similar offence in the third ODI at Jamshedpur.