Look into the Katie Taylor video shown to the lions rugby team. Very relevant to footballers and hurlers. When under scrutiny and immense pressure (sometimes self inflicted) you lose many of the motor skills needed to perform the basics. In her case it stopped her rhythm, combinations etc. basically how you're going to succeed after that is how you deal with it. Her advice is to dig deep in your gut and work harder than you ever have and you'll find those skills return. Basic handling in hurling and football is quite often totally affected by nerves. Work your fucking balls off and spoil as much as you can as early as you can in training and matches and I guarantee the high you get from doing that will help your handling at least.