American football: What is 'deflate-gate' about?

The Superbowl is the final game of the American Football season in the US and tonight the New England Patriots take on the Seattle Seahawks for the title.

But the build up to the game's been overshadowed by a big row over whether balls used in the semi-finals were deliberately deflated to make them easier to catch.

Jenny went to meet an American football team here in the UK to find out more.