US showing in Australia just ‘a bad day’

United States' Sloane Stephens bends over while playing China's Zhang Shuai during their first round match at the Australian Open tennis championships in Melbourne, Australia, Monday, Jan. 15, 2018. (AP Photo/Dita Alangkara)

All it took was one bad day at the Australian Open to unravel all those good feelings about American tennis generated by so much success at the U.S. Open only a handful of months ago.