Leonardo DiCaprio sports beard at quarter finals of U.S. Open

NEW YORK, Sept. 4 (UPI) -- A lonely Leonardo DiCaprio was photographed playing with his beard and taking pictures during the U.S. Open tennis quarter finals in New York City on Wednesday.

DiCaprio looked casual in jeans and a blue button down as he watched Serbia's Novak Djokovic play Britain's Andy Murray in Arthur Ashe Stadium. The 39-year-old actor donned his signature newsboy cap and kept his long hair in a ponytail for the event.

Djokovic beat Murray 7-6, 6-7, 6-2, 6-4 in Wednesday's match thus advancing to his eighth consecutive U.S. Open semi-final.

Like DiCaprio, many other celebrities have taken to the USTA Billie Jean King National Tennis Center over the course of the week to watch the 2014 U.S. Open. On Monday, fashionistas Mary-Kate Olsen and Heidi Klum were photographed simultaneously kissing their significant others, Olivier Sarkozy and Vito Schnabel, while watching Victoria Azarenka play Aleksandra Krunic in the fourth round of the tournament.

Alec Baldwin, SNL's Jay Pharaoh, Luke Bryan and Josh Groban also attended Monday's match.