If you watch an interesting game or two once in a while, ask the address of the webcast on the relevant forum before the game.
The public TV station here occasionally broadcasts some games that local people care about, such as rugby World Cup, cricket World Cup, America's Cup regatta and so on. Television stations use advertising revenue to buy broadcasting rights, free of charge to viewers.
If you really don't want to pay to watch the Champions League finals and other important games, you can go to the bar of TAB, Casino or Sky Sports Games, buy a beer and stand and shout with other fans, which is also quite atmospheric. But it's better to ask in advance where this will be displayed (for locals, the NBA finals are not as important as local horse racing, hehe)