I got a little behind on my count so I'll have to lump the tally from the entire time I've been in Melbourne. Despite the fact that Melbourne is populationally smaller than Sydney the count has been relatively high. The Aussie Open was littered with blacks. They were primarily from Nigeria which is surprising as I don't believe there's ever been a Nigerian professional tennis player in the history of ever.
Tally for the 3 days spent in Melbourne: roughly 35*
*The count would have been higher but several "blacks" turned out to be Indian.....don't worry, I asked.