Vodafone has responded to submissions to the Commerce Commission opposing its planned merger with Sky Network Television.
Vodafone said organisations that have opposed the merger had "wholly unrealistic" ideas about the harm it would cause for consumers.
Spark formally opposed the proposed merger, which would see Britain's Vodafone with 51 per cent of the shares of the combined Sky TV and Vodafone New Zealand business.
Spark submitted to the Commerce Commission that if the merger was blocked, market conditions would force Sky to make all sports content available online and on-demand.
Customers would be better served if the merger was blocked, Spark submitted.