Flushing Meadows, NY -- (Sports Network) - Gritty Russian star Nikolay Davydenko was a third-round winner Friday at the 2008 U.S. Open.

The fifth-seeded Davydenko doused Argentine Agustin Calleri 6-4, 6-4, 7-6 (7-2) on Day 5 at the USTA Billie Jean King National Tennis Center.

The steady Davydenko, seeking a third straight trip into the U.S. Open semifinals, will meet fellow Russian Dmitry Tursunov in the round of 32. A 26th-seeded Tursunov came from behind to beat capable Romanian Victor Hanescu 6-7 (2-7), 6-3, 6-4, 6-2.

Former Australian Open runner-up Fernando Gonzalez also moved on, as the Chilean slugger handled American Bobby Reynolds 7-6 (8-6), 6-4, 6-4. The 11th- seeded "Gonzo" was an Olympic silver medalist in Beijing earlier this month.

A pair of unseeded gentlemen overcame two-set deficits on Friday, as Luxembourg's Gilles Muller came all the way back to stun former top-five star Tommy Haas of Germany 2-6, 2-6, 7-6 (7-5), 6-3, 6-3 and Finn Jarkko Nieminen fought his way past Czech Ivo Minar 6-7 (2-7), 3-6, 6-4, 6-3, 6-2. The talented but oft-injured Haas reached the quarterfinals here the last two years and is still seeking that elusive first-ever trip into a Grand Slam final.