Serbia has selected Viktor Troicki over Janko Tipsarevic to face John Isner in Friday’s Davis Cup tie on clay.
Troicki and Isner have only met once, in Bangkok on a hard court last year when Troicki won in straight sets.
“John has a had a great week of practice so he’s in there with a pretty good chance,” said US captain Patrick McEnroe.
World No. 2 Novak Djokovic will play Sam Querrey in the second match. “Sam is going to have to take his game to another level,” said McEnroe.
On Saturday, Tipsarevic and Nenad Zimonjic will face the Bryan brothers.