MONACO -- France captain Guy Forget has chosen Gilles Simon to play singles against the United States in their Davis Cup quarterfinal Friday on clay.
American captain Jim Courier is without Mardy Fish, who pulled out with fatigue this week.
"We're very prepared. We have a great team, a great coach and captain," said Harrison, whose only Davis Cup appearance came in the meaningless reverse singles during the 5-0 sweep of Switzerland in February. "I think we're as prepared as can be."
Isner recently beat Simon at Indian Wells, but feels that win will count for little.
"I don't think it's going to make that much of a difference," Isner said. "It's Davis Cup. It's a whole different animal than a regular tournament. (Simon's) going to take to the court very confident."