Lifelong friends Roberta Vinci and Flavia Pennetta, along with Daniela Hantuchova, reached the US Open quarterfinals on Monday to ensure five women over the age of 30 will be in the last eight.

Vinci, the 10th seed, beat Italian compatriot and qualifier Camila Giorgi 6-4, 6-2 to reach the quarters for the second straight year.

Pennetta, No 83 in the world, made the last eight for a fourth time with a 6-2, 7-6 (3) win over Romanian 21st seed Simona Halep and will tackle childhood friend Vinci with a place in a major semifinal at stake for the first time.