U.S. players Sam Querrey, left, and John Isner listen during a news conference Tuesday, April 2, 2013, for this weekend's Davis Cup tennis match between the United States and Serbia in Boise, Idaho. ... more 
U.S. players Sam Querrey, left, and John Isner listen during a news conference Tuesday, April 2, 2013, for this weekend's Davis Cup tennis match between the United States and Serbia in Boise, Idaho. (AP Photo/Idaho Press-Tribune, Greg Kreller) less 
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Associated Press | Photo By Idaho Press-Tribune, Greg Kreller
Thu, Apr 4, 2013 3:21 PM EDT