ST. PETERSBURG, Sept. 20 (Xinhua) -- Following are the results Wednesday from the ATP World Tour St. Petersburg Open at Sibur Arena:

Singles, first round

5-Roberto Bautista Agut, Spain, bt Luca Vanni, Italy, 7-5, 6-2

Mikhail Kukushkin, Kazakhstan, bt Denis Istomin, Uzbekistan, 7-5, 2-4 retired

7-Denis Shapovalov, Canada, bt Adrian Menendez-Maceiras, Spain, 7-6 (3), 6-2

Guido Pella, Argentina, bt Ilya Ivashka, Belarus, 4-6, 6-3, 6-4

Mikhail Youzhny, Russia, bt Mirza Basic, Bosnia-Herzegovina, 7-6 (6), 6-4

Second Round

Stan Wawrinka, Switzerland, bt 4-Karen Khachanov, Russia, 7-6 (10), 7-6 (1)

Martin Klizan, Slovakia, bt 2-Fabio Fognini, Italy, 6-3, 6-4

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