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John Isner closes in on his fourth semi-final at the Delray Beach Open.

Isner Sails Into Delray Beach QF

Second seed going for first title of the season

John Isner advanced to his second quarter-final in as many weeks on Wednesday (New York), dismissing Slovakian Lukas Lacko 6-4, 6-3 at the Delray Beach Open by VITACOST.com. The three-time semi-finalist dropped only one first-serve point (31/32) and improved to 4-0 against Lacko in their FedEx ATP Head2Head series, which dates back to Auckland 2014.

"It was a good win. I think I'm getting more comfortable on this surface, especially with the positioning on my return... I was challenging him on a lot of return games," Isner said. "I was very happy how I came through that."

The second-seeded Isner will face eighth seed Adrian Mannarino for a place in the semi-finals. The Frenchman beat Denis Istomin of Uzbekistan 6-2, 7-6(3) for his second win of 2019.

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Brit qualifier Daniel Evans reached his third tour-level quarter-final – and first since the 2017 Sydney International. The 28-year-old, No. 148 in the ATP Rankings, routed South Africa's Lloyd Harris 6-0, 6-2 in only 69 minutes.

Evans upset third seed and defending champion Frances Tiafoe on Tuesday night. The Brit will face Italy's Andreas Seppi, who outplayed Aussie Jordan Thompson 6-3, 4-6, 6-1.

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