Thing is... if you start with Watkins and let him get 80 minutes in or something like that, you then bring Kane on which means having Kane on the pitch fresher and ready for extra time if required and a possible penalty shoot out. You have your best penalty taker on the pitch. Kane trotting around doing very little for 80 minutes, you then sub him and you're suddenly without your best penalty taker. For me it's a no brainer... but Southgate in his post match interview said he thought Harry had a good game so....