Lleyton Hewitt, a former champion at Indian Wells, beat John Isner, the tourney's top-ranked American.
Stephen Dunn/Getty Images

INDIAN WELLS, Calif. (AP) -- Lleyton Hewitt upset No. 15 seed John Isner 6-7 (6), 6-3, 6-4, in a second-round match at the BNP Paribas Open championships on Saturday.

"I did what I could," Hewitt said on court after closing out the 2-hour, 22-minute match on his fourth match point.

"I think I handled his serve pretty well and I made him hit a lot of balls."

The 6-foot-9 Isner, the highest-ranked American, had 18 aces, but lost his serve twice and couldn't convert any of his four break chances on Hewitt's serve.

The second break by Hewitt, in the seventh game of the third set, gave the two-time champion a 4-3 lead. He added to it by holding serve for 5-3. Then, after Isner held for 5-4, Hewitt served out the match.

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