KOOLHOF NED/SKUPSKI GBR [1] vs ALTMAIER GER/KARATSEV
HIJIKATA AUS/KUBLER AUS vs PAUL USA/TIAFOE USA (W)
ISNER USA/SOCK USA (W) vs PURCELL AUS/THOMPSON AUS
CASH GBR/JOHNSON GBR (W) vs GONZALEZ ARG/MOLTENI ARG [14]
MEKTIC CRO/PAVIC CRO [9] vs DEMOLINER BRA/MIDDELKOOP NED
BROADY GBR/O'MARA GBR (W) vs CABRAL POR/MATOS BRA
BEHAR URU/PAVLASEK CZE vs ANDREOZZI ARG/CERUNDOLO ARG
CHARDY FRA/HUMBERT FRA vs MARTIN FRA/MIES GER [8]
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RAM USA/SALISBURY GBR [3] vs KOKKINAKIS AUS/KYRGIOS AUS
ESCOBAR ECU/NEDOVYESOV KAZ vs BOLELLI ITA/VAVASSORI ITA
EUBANKS USA/WOLF USA vs DOUMBIA FRA/REBOUL FRA
HAASE NED/OSWALD AUT vs MELO BRA/PEERS AUS [16]
GLASSPOOL GBR/MAHUT FRA [11] vs CRESSY USA/GOLUBEV KAZ
BARRIENTOS COL/BORGES POR vs RAMOS-VINOLAS ESP/ZAPATA MIRALLES ESP
FEARNLEY GBR/MONDAY GBR (W) vs GORANSSON SWE/MCLACHLAN JPN
DURAN ARG/ETCHEVERRY ARG vs BOPANNA IND/EBDEN AUS [6]
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GONZALEZ MEX/ROGER-VASSELIN FRA[5] vs CORNEA ROU/LAJOVIC SRB
CACHIN ARG/HANFMANN GER vs SAMUEL GBR/THOMSON GBR (W)
CARBALLES BAENA ESP/GALAN COL vs BLUMBERG USA/RUUD NOR
CACIC SRB/REYES-VARELA MEX vs KRAWIETZ GER/PUETZ GER [10]
MURRAY GBR/VENUS NZL [13] vs OLIVETTI FRA/VEGA HERNANDEZ ESP
ERLER AUT/MIEDLER AUT vs HERBERT FRA/RINDERKNECH FRA
吴易昺 WU CHN/张之臻 ZHANG CHN vs DAVIDOVICH FOKINA ESP/MANNARINO FRA
MCDONALD USA/SHELTON USA vs NYS MON/ZIELINSKI POL [4]
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AREVALO ESA/ROJER NED [7] vs HUESLER SUI/NAKASHIMA USA
BAEZ ARG/PELLA ARG vs LAMMONS USA/WITHROW USA
ARNEODO MON/WEISSBORN AUT vs DELLIEN BOL/VARILLAS PER
DJERE SRB/O'CONNELL AUS vs GILLE BEL/VLIEGEN BEL [12]
GRANOLLERS ESP/ZEBALLOS ARG [15] vs CABAL COL/FARAH COL
TSITSIPAS GRE/TSITSIPAS GRE vs FILS FRA/VAN ASSCHE FRA
GALLOWAY USA/HARRIS RSA vs GIRON USA/VAN DE ZANDSCHULP NED
BUBLIK KAZ/SAVILLE AUS vs DODIG CRO/KRAJICEK USA [2]