Go to your google calendar then to your subscriptions click settings and then continue. From here drill down into interesting calanders, click on sport then select football or which ever sport you desire, then your league and finally next to the name of the team you would like to subscribe to click subscribe. A great replacement of the Telegraph Calendar that is now non-existant.
Amazing for android users like me! :D
Sorry if the instructions weren't very accurate as I was trying to do this from memory!