R3 should be enough. I think he'll just squeeze a seed, especially if Tsonga ends up pulling out.
Chris Eaton is the first Brit to make it through QR1, beating highly-rated Aussie teenager (one of half-a-dozen!) Benjamin Mitchell in three sets.
On the subject of Aussie teenagers, they have some serious talented youngsters coming through: Bernard Tomic (19; #27), James Duckworth (20; #194), Ben Mitchell (19; #234), Matt Reid (21; #258) Jason Kubler (19; #320) and Luke Saville (18; junior #1, currently holds 3 of the 4 junior Slams).
Back on topic, Liam Broady's match is underway against Italian Thomas Fabbiano (ranked #24) and is in-fact an early break up (leads 2-0).
Broady is broken back serving for the first set.
And Broady loses the first set 6-7 (5).
Apparently Andy is in attendance today to offer his support to the other Brits. Nice touch.