Jurgen Melzer joined Radek Stepanek as only the second active player to record 300 singles and doubles career match wins on Thursday at the VTB Kremlin Cup.
The Austrian partnered Julian Knowle to a 6-1, 5-7, 11-9 victory over Mikhail Kukushkin and Stephane Robert in Moscow. They will next face top seeds Pablo Carreno Busta and Marcel Granollers or wild cards Daniil Medvedev and Andrey Rublev in the semi-finals.
The 35-year-old Melzer has compiled a 347-331 record, including five titles as a singles player, and is now 300-242 lifetime, with 13 trophies, as a doubles competitor.