Isner loses, U.S. trails Serbia 1-0 in Davis Cup

BELGRADE, Serbia (AP) -John Isner lost to Viktor Troicki 7-6 (4), 6-7 (5), 7-5, 6-4 to give Serbia a 1-0 lead over the United States in the first round of the Davis Cup.

Isner had 21 aces in his Davis Cup debut, but Troicki converted his fourth match point with a crosscourt volley after 3 hours, 36 minutes on the clay court at Belgrade Arena.

Sam Querrey faces second-ranked Novak Djokovic in the second singles.

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The match marks the first time since 2000 that neither Andy Roddick nor James Blake has played for the U.S. team.

Serbia is trying to move beyond the first round in the World Group for the first time.

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