Evan King of Chicago, the second seed in boys 16s, got off to a slow start against unseeded Casey McMaster, the 32nd seed from Fort Collins, Colo., losing the first three games before rallying for a 6-4, 6-0 win Tuesday morning.
"He came off on his serves, just firing serves and that definitely played a part in it," King said.
King advances to Wednesday's round of 16.

Source: USTA Nationals Staff