Keep your calendar up to date with the matches you've signed up for by subscribing to your personal Grands calendar feed. An iCal feed automatically syncs all your matches to your external calendar application, such as Google Calendar or iCalendar.
In the app: Go to Account, under Calendar select Subscription Calendar, then tap Copy URL to Clipboard.
On the web: Go to Account, then select Calendar sync to find your personal iCal feed URL.
Once you have your URL, follow your device or application's instructions for adding an iCal feed, and paste the URL when prompted.