On Android, you can either mute push notifications for the time being or for a set amount of time. You can choose between turning them off fully, muting them for 2 hours, 4 hours or until 8:00am the next morning.
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All you have to do is press "settings," then "push notifications," then tap the bell in the top right hand corner.

This pulls up a menu that allows you to choose how long to mute them for. 

It also allows you to turn them back if you have turned them off.

Here is a video: 

On iOS, you can mute push notifications in the app for 2 hours, 4 hours or until 8:00am the next morning.

To do this, go to 'settings' then 'push notifications' and at the top of the list you will see a toggle next to 'mute' slide that over and then you choose. 

If you want to unmute them, slide the toggle back and press 'unmute.' 

Here is a video:

N.B. You can also hide the score of a match to mute notifications for that specific match, see this article for an explanation: https://goo.gl/rDk5kV
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