Hey @Annjt, thanks for reaching out 🙂
It depends on whether you're on an eligible offer. The data free streaming offer is available for customers who have "Mobile TV streaming" built into their plan. Data free Mobile TV streaming is available on each plan tier, so I'm sure you'll be fine.
You can always double check if you already have or are eligible to add Mobile TV Streaming in My Account and My Optus App (go to Entertainment). Eligible customers will either have Mobile TV Streaming included in the plan or you can pay $10 per month.
Once enabled, you'll just need to download the 7TENNIS app and you'll be able to stream till your heart's content 🙂
If you have any questions, please let us know.