Van de Zandschlup lost to Nadal in straight sets at Wimbledon, but he is capable of troubling the world's best.
The Brazilian has never advanced past the second round of a major, but given her recent form, she is capable of going much further.
Coric defeated world No. 5 Stefanos Tsitsipas in the final, 7-6, 6-2, capping off a fantastic week in which he defeated Rafael Nadal
There is arguably no woman in better shape than France's Caroline Garcia. The 28-year-old won the Cincinnati Masters in straight sets
Rune's recent form has been erratic, with losses to Cameron Norrie, Pablo Carreno Busta, and American JJ Wolf in recent weeks.
Cirstea reached the Australian Open's last 16 in Melbourne this year before losing in three sets to Iga Swiatek.
Musetti famously took Novak Djokovic to five sets at last year's French Open, demonstrating his talent.
With this and coming off a quarterfinal at Wimbledon, Tomljanovic has a good chance of making it into the second week at the very least.