Results in the ATP Monte Carlo Masters on Monday: 1st round Aslan Karatsev (RUS) bt Lorenzo Musetti (ITA) 6-3, 6-4 Alejandro Davidovich (ESP) bt Alex De Minaur (AUS) 6-4, 7-6 (7/3) John Millman (AUS) bt Ugo Humbert (FRA) 6-3, 6-3 Tommy Paul (USA) bt Pedro Martinez (ESP) retired afp