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Uzbekistan number two Farrukh Dustov suffered a defeat at the hand of the Australian number one Bernard Tomic - 6:7(6), 4:6, 4: 6.
In the second match, Uzbekistan number one Denis Istomin outplayed Marinko Matosevic in four sets - 6:4, 7:6(1), 3:6 and 6:4.
Farrukh Dustov and Istomin will be back on court tomorrow for the doubles, while Australia will field a fresh pairing, Lleyton Hewitt and Matthew Ebden.