The telco will begin their coverage in August by showing Champions League play-off games having snared the rights to the three competitions from previous broadcaster beIN Sports.
SBS, who ultimately shared the coverage of the 2018 World Cup with Optus, are still expected to show a certain number of Champions League matches on free-to-air.
After beginning their foray into football broadcasting with the English Premier League, Optus Sport recently had the full broadcast rights to the 2018 World Cup but technical difficulties saw them forced to share it with SBS.
In the aftermath, Optus refused to take a backwards step however by locking down the UEFA European Championship and the Nations League.
Earlier in the year they also secured a further three seasons of Premier League coverage in Australia with their latest acquisitions proving Optus Sport mean business when it comes to football broadcasting in Australia.
“This is an incredibly exciting time for Optus as we continue to build upon our strategy of delivering elite international football and exclusive content for customers," Optus Managing Director of Marketing and Product Ben White said.
“Adding these tournaments and elite football matches to Optus Sport provides our customers with more than double the live premium football content compared to this time last year.
"We have a clear vision for Optus Sport and our newly acquired rights highlight our confidence in our platforms as well as our production and approach."
Optus Sport has been made free for all Australian until August 31 following troubles with their World Cup coverage.