I know it's not Federer's fault, but his draw in the AO has been profoundly easy. Here are the rankings of his opponents so far:
1st. Johnson, 75
2nd. Krajanovic, 41
3rd. Millman, 47
4th. Fucsovics, 67
Qtr: Sandgren, 100
Assuming Fed beats Sandgren, he would have made it to a GS semifinal...