by dave g Here are the matches:
MUNAR, Jaume ESP vs MONFILS, Gael FRA
24 KORDA, Sebastian USA vs 9 TSITSIPAS, Stefanos GRE
15 MUSETTI, Lorenzo ITA vs 18 AUGER-ALIASSIME, Felix CAN
Ugo Carabelli (LL) vs 4 DJOKOVIC, Novak SRB
5 RUUD, Casper NOR vs 30 TABILO, Alejandro CHI
23 CERUNDOLO, Francisco ARG vs 12 PAUL, Tommy USA
14 DIMITROV, Grigor BUL vs 22 KHACHANOV, Karen
31 NAKASHIMA, Brandon USA vs GOFFIN, David BEL