The United States tennis captain Jim Courier has picked teenager Ryan Harrison in a four-man squad to play Switzerland next month in the first round of the Davis Cup.
The 19-year-old Harrison joins Mardy Fish, John Isner and Mike Bryan in the team to play on clay indoors at Fribourg in Switzerland from February 10-12.
Bob Bryan misses the match because his wife is due to have a baby, so Courier says Fish and Mike Bryan are the likely doubles pairing, with Fish and Isner playing the singles.
Andy Roddick had already decided not to play before he was injured during the Australian Open.
Switzerland's team is likely to be led by 16-time grand slam champion Roger Federer.