Graf wasn't, the first time. She was in Flushing. Neither was Navratilova. The Aussie was in November back then, so she completed hers at Roland Garros. I'm not 100% certain about that but very close to it.
I think what the clarification is, is that 5 women have won 4 different slams in a row, Calender and Non-Calender ... those five being - Court, Navratilova, Graf, Connolly & Williams. Apart from Connolly who has passed, all the others were in Melbourne for some reason or another - Williams, Navi were competing, Court was there for her naming of the MCA ect. And Steffi was there for Andre ... so it was very coincidental!! - I personally think they should have a photo shoot together ... but anywayz!