The Australian Open will be shown on Channel Nine in 2019, with an agreement reached between Nine, Tennis Australia and the Seven Network to bring forward their broadcasting deal by one year.
Nine had already agreed to pay $300 million to secure the rights from Seven over five years from 2020, but it will now fork out an extra $48.5 million to show the tournament next year.
The deal encompasses the Australian Open in Melbourne as well as the lead-up tournaments around Australia - the Hopman Cup in Perth and the Brisbane, Sydney and Hobart Internationals.
Seven offloaded the tennis because they have the rights to the domestic cricket summer starting this year, and it would have been difficult to show the Open and Test matches at the same time.
Tennis Australia chief executive Craig Tiley has praised Seven for its long-time relationship with the sport.
"We've enjoyed a 40-plus year partnership with the Seven Network and are glad we could reach an agreement which is in all our best interests," he said.
"We are excited by the move to Nine this summer and the opportunity it gives us to expand our content."
Under the deal, Nine has the rights to streaming, mobile, digital and social platforms as well as broadcast.