The 18-year-old said he met Federer for the first time last year, while he has practiced with Wawrinka as the pair share the same management team.

The 2014 winner is joined by eight Aussies, with more wild card announcements to come.

Responding to the Greek's latest lengthy complaint on the tour calendar, the Swiss threw some major shade by unearthing a video where Tsitsipas was singing a different tune.