White Plains, NY (SportsNetwork.com) - Serena and Venus Williams and teenage Australian Open semifinalist Madison Keys were selected to play Fed Cup tennis for the United States next week.
Team USA is trying to return to the World Group for 2016.
U.S. captain Mary Joe Fernandez announced that the 18-time major champion Serena and seven-time Grand Slam titlist Venus will be joined by Keys and 30th-ranked Varvara Lepchenko on a team that will face host Argentina in Buenos Aires from February 7-8.
The 19-year-old Keys upset Venus at the Aussie Open to reach her first major semifinal, where she lost to the top-ranked Serena on Thursday.
The Americans fell out of the Fed Cup's World Group for just the second time since the current format was introduced back in 1995. They must defeat the Argentines then win another series in April to return to the top group next year.
Serena last played in the Fed Cup in 2013, the previous time the U.S. needed to win to get back into the World Group.
Former top-ranked junior Taylor Townsend will also join the team in Buenos Aires as a practice player.