Virgin Media sees BT as being its main rival in the broadband, home phone and TV market, it has been claimed.
Tom Mockridge, Chief Executive of Virgin Media, noted that there are only two main networks in the UK. There is Virgin Media's cable network, and BT's telecoms infrastructure, he told This is Money.
Mr Mockridge said that if households buy services from Sky, they are "a BT customer" - referencing the fact that Sky's broadband and phone services are delivered over BT's network.
The same applies to other broadband providers who use BT's wholesale network.
"And if you buy from Plusnet, it is a subsidiary of BT," he added.
Both BT and Virgin Media have invested heavily in their broadband infrastructure in recent years, rolling out fibre service to offer faster download and upload speeds.
Mr Mockridge told the news provider that Virgin Media is continuing to upgrade its own network, in a bid to deliver improved service to customers.
"One of our striking statistics is that the capacity usage on our network is rising by 50 per cent a year," he stated.
"Over the next decade it is 5,800 per cent or something. It’s just phenomenal."