EN FOTOS: Bruce Arena y EEUU debutan sin gol en San Diego
United States head coach Bruce Arena, left, shakes hands with Sunil Galati, President of the U.S. Soccer Federation, before a friendly soccer match against Serbia, Sunday, Jan. 29, 2017 in San Diego. (AP Photo/Denis Poroy) (Denis Poroy / AP)
United States’ Sebastian Lletget, right, goes after the ball with Serbia’s Milos Simonovic during a friendly soccer match, Sunday, Jan. 29, 2017 in San Diego. (AP Photo/Denis Poroy) (Denis Poroy / AP)
United States’ Juan Agudelo, left, covers his face after a missed opportunity as Serbia’s Marko Klisura, right, claps during a friendly soccer match Sunday, Jan. 29, 2017 in San Diego. (AP Photo/Denis Poroy) (Denis Poroy / AP)
United States’ Jorge Villafana, right, passes past Serbia’s Enver Alivodic, left, during a friendly soccer match Sunday, Jan. 29, 2017, in San Diego. (AP Photo/Denis Poroy) (Denis Poroy / AP)
United States head coach Bruce Arena, right, looks on from the sideline during warmups before a friendly soccer match against Serbia, Sunday, Jan. 29, 2017 in San Diego. (AP Photo/Denis Poroy) (Denis Poroy / AP)
SAN DIEGO, CA - JANUARY 29: Head coach Bruce Arena of the United States looks on during pregame warm-ups prior to their match against Serbia at Qualcomm Stadium on January 29, 2017 in San Diego, California. (Photo by Kent Horner/Getty Images) ** OUTS - ELSENT, FPG, CM - OUTS * NM, PH, VA if sourced by CT, LA or MoD ** (Kent Horner / Getty Images)