MELBOURNE, Australia -- Stefanos Tsitsipas advanced to the quarterfinals at the Australian Open in one of the final matches on Day 8 of the tournament.
The fourth-seeded Tsitsipas beat Taylor Fritz 4-6, 6-4, 4-6, 6-3, 6-4 in the men's fourth round on Rod Laver Arena.
Fritz was playing in the fourth round of a major for the first time.
The No. 2-ranked Medvedev is trying to become the first man in the Open era to win his second major singles title in the next Grand Slam event.
He's now potentially three wins away from back-to-back major titles.
Medvedev was a runner-up in Australia last year but avenged that with a win over Novak Djokovic in the US Open final. Djokovic isn't defending his Australian Open title after being deported on the eve of the year's first major for failing to meet the country's strict COVID-19 vaccination rules.
Medvedev had to struggle against the No. 70-ranked Cressy in a match lasting 3½ hours. Cressy saved eight break-point chances in the fourth set before Medvedev got the decisive break in the 11th game, then served out at love to finish it off.
Information from the Associated Press contributed to this story.