INDIAN WELLS, Calif. (AP) — Tallon Griekspoor upset No. 1 seed Alexander Zverev 4-6, 7-6 (5), 7-6 (4) in a second-round match at the BNP Paribas Open on Friday.
The loss came eight days after Zverev also was the top seed when he was upset by American teenager Learner Tien 6-3, 6-4 in Acapulco, Mexico.
The Zverev-Griekspoor match lasted 3 hours, 7 minutes. Griekspoor collapsed on the court after converting his sixth match point for his first win over an opponent ranked in the top five.
The 28-year-old from the Netherlands improved to 2-6 against Zverev, currently ranked No. 2.
"It was such a mental thing. I lost to him five times last year and had absolute heartbreak at Roland Garros where I was up a double break in the fifth," Griekspoor said. "I played so many battles against him and had chances but they all went his way. I am incredibly proud of myself from this performance and to get it over the line."