NEW YORK, (Reuters) – The dream final between Roger  Federer and Rafael Nadal could become a reality when the world’s  top two players contest their respective semi-finals at the U.S.  Open today.

Federer, bidding for a modern-day record sixth straight  title in New York, plays fourth seed Novak Djokovic in a repeat  of last year’s semi-final.

Nadal, chasing his first U.S. Open crown and the completion  of a career grand slam, takes on in-form Argentine Juan Martin  del Potro.