DELRAY BEACH, Fla. (AP) — John Isner and Marin Cilic notched quarterfinal victories Friday night to set up a semi-final match at the ATP World Tour Delray Beach Open.
No. 4 seed Kevin Anderson of South Africa and American qualifier Steve Johnson will meet in the other semifinal.
Isner was stretched to three sets for his third consecutive match, beating American qualifier Rhyne Williams 4-6, 6-3, 6-2.
"Trust me, I'd like to win it in two sets," said Isner, the American who is seeded second.
Cilic, the seventh seed, now has won an ATP World Tour-leading 16 matches this season. The Croatian delivered 12 aces in his 6-2, 6-3 win against Gabashvili.
"Good times are rolling," Cilic said.
Johnson defeated No. 6 seed Feliciano Lopez 6-3, 6-2. The 24-year-old from the University of Southern California upset top-seeded Tommy Haas two days ago and earned a spot in the semifinals for the first time at an ATP event.
"I'm playing composed tennis and staying within myself," said Johnson, who helped USC to four NCAA titles.
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