Top-seeded Ivan Lendl and fifth-seeded Emilio Sanchez both breezed into the quarterfinals Thursday night in the $415,000 Eagle tennis tournament, while Yugoslavian teen-ager Goran Ivanisevic upset eighth-seeded Andrei Chesnokov of the Soviet Union.
Lendl, the No. 1-ranked men’s player in the world, needed just 69 minutes to eliminate South Africa’s Christo van Rensburg, 6-0, 6-2, in their second-round match.
Van Rensburg, ranked 37th in the world, won only six points in the first set.
“If tonight is any indication, I’m hitting the ball quite well,” said Lendl, who defeated Paul Annacone, 6-2, 6-4, in the first round.
Sanchez, a Spaniard ranked 17th in the world, beat Australia’s Mark Woodforde, 6-3, 6-3, in a 68-minute match.
Unseeded Jim Courier, 18, eliminated 30-year-old Johan Kriek, 6-1, 6-1, in another second-round match on the hardcourts of the Scottsdale Princess resort hotel.
Kriek, a South African ranked 39th in the world but unseeded here, had ousted third-seeded Jimmy Connors, 6-4, 4-6, 6-4, in the first round.
Still, the big winner Thursday was Ivanisevic, 17, ranked 119th in the world. He beat the 19th-ranked Chesnokov, 4-6, 6-3, 6-3.
Ivanisevic blew a 4-1 lead in the first set but came back to score what he called the biggest victory of his career.
“The first set, I was up 4-1 and then I started to hurry,” Ivanisevic said. “Every backhand that I hit was out. Then I started serving bad and lost some games. In the second and third sets, I played not too bad.”