When is it, who's involved, how to watch?
The Australian Open kicks off the 2018 season. You can enjoy one of the Slams during the Winter season while the rest have to be played in Spring or Summer.
Australian Open Website
Australian Open Twitter #AusOpen
ATP on the Australian Open
I've always loved the Aussie Open knowing that it was the home of the tennis boom of the 60's and 70's led by the Australians. It has the benefit of a counter cyclical weather season that makes it ideal for January play while the rest of the outdoor Slams are in the cold. It's coming soon.