Originally Posted by sdont
Yep, that's why he's able to hit 3, 4 or 5 aces in a row sometimes.
Please enlighten us about all his technical flaws. Except from the BH side, I don't see what you're talking about.
He has a great first serve, but the rest of his game is erratic and inconsistent because his strokes are not as technically sound as other top players. He can his his forehand great at times, but he cannot sustain it. Inconsistency is a sign of weak technical skills.
For his career he has won less than 50% of points on his second serve.