Christopher Lam defeated Daniel Yoo 6-0 6-3 in the USA F20 round of 32 on hard.
Lam C. took it in straight sets.
Christopher Lam beat Daniel Yoo 6-0 6-3. Umpiry, "Christopher Lam vs Daniel Yoo — USA F20 Round of 32", https://umpiry.com/match/2007-07-30/lam-vs-yoo-usa-f20-r32?utm_source=cite (as of 30 July 2007).