Thanasi Kokkinakis has upset Latvian world number 13 Ernests Gulbis 5-7, 6-0, 1-6, 7-6 (7-2), 8-6 on Monday night, advancing to a second round match-up with fellow Aussie Sam Groth at the Australian Open in Melbourne.
The 18-year old was overwhelmed by the local support and it pushed him into his first…
