Zverev overcomes deficit, 12 double-faults for US Open semis

NEW YORK (AP) - The disqualification of Novak Djokovic from the U.S. Open, and the absences of Rafael Nadal and Roger Federer, presented quite an opportunity to Alexander Zverev and the other men left in the tournament - all in their 20s, all seeking a first Grand Slam title.

Who ...