If you're working in Vladivostok and leave work at 5.59pm, I can see this being a problem
If however, you work in Sydney's CBD and leave work before 5.20pm then you would be able to get to the SCG by 6pm
The SCG is a 20 minute walk from Central station
Even if you were in Circular Quay you could leave work at 5.15pm, catch a train to Central and walk
If you factor in buses etc, you'll be there in plenty of time
If you sit on your computer whinging on League Unlimited about how unfair it is and don't get off your arse and move, then chances are, you'll miss the game