Jason Cook defeated Simon Aspelin 6-4 7-6 in the USA 4 Masters 4 round of 64 on hard. The upset overturned the form book — Simon Aspelin came in leading the head-to-head 1–0. Jason Cook claimed a first win over Simon Aspelin in two meetings, levelling the head-to-head at 1–1.
Cook J. took it in straight sets.
Jason Cook beat Simon Aspelin 6-4 7-6. Umpiry, "Jason Cook vs Simon Aspelin — USA 4 Masters 4 Round of 64", https://umpiry.com/match/1998-10-16/aspelin-vs-cook-usa-4-masters-4-r64?utm_source=cite (as of 16 October 1998).