The pace and touch inside takes him right into the defender who is blocking his path. He could have carried on but he had a lot to do.
He saw the leg and went over it. 90% of the time the ref gives that. And as I have said elsewhere, next week this will get given at the other end.
If you are looking for blame over the result I would suggest looking at the previous 70 minutes. We were largely second best from the minute we gave away that stupid equaliser.