What would you ask Roger Federer if you had the chance?
We're giving some of our lucky readers an opportunity to ask the Swiss legend a question. All you have to do is tweet your question to us @australianopen with the hashtag #askrf - then we'll choose a selection of the best to ask Roger.
You can watch Wednesday night's charity match between Federer and Jo-Wilfried Tsonga, as well as the Twitter questions and Roger's answers on our live video stream or on Channel Seven if you're in Australia.
The charity match entertainment begins at 8pm Wednesday local time.
Find us on Twitter here: @australianopen