"I know how hard a five-setter can be. I know how intense a night session can be and all these things.
"Whatever that means - length of rally, length of match, intensity - I've been there.
"That could potentially help me, but it could also not help me."
Also on Saturday night, French 14th seed Gilles Simon will take on flashy countryman Gael Monfils.
US Open champion Andy Murray will play his third round match earlier on Saturday, against unseeded Lithuanian Ricardas Berankis.
Slovenian Blaz Kavcic, whose marathon second-round win over James Duckworth on Thursday left Tomic as the last local standing, will meet athletic French seventh seed Jo-Wilfried Tsonga.
In the women's draw, reigning champion Victoria Azarenka will be heavily favoured to beat unseeded American Jamie Hampton, as will Serena Williams against Japan's Ayumi Morita.
British teenager Laura Robson, who upset eighth seed Petra Kvitova in the second round, will be up against another youngster, American 19-year-old Sloane Stephens.
-AAP