Errani, the 2012 French Open runner-up, is most comfortable on clay, while the 29th-ranked Lisicki likes the faster surfaces. Lisicki, the 2013 Wimbledon runner-up, hit the fastest recorded serve in WTA history (131 mph) last week at Stanford.
American qualifier Shelby Rogers defeated Ajla Tomljanovic 6-4, 7-6 (5) to set up a second-round meeting with the star attraction of this year's event, fifth-seeded Eugenie Bouchard of Westmount, Quebec. That match is expected to be played Tuesday night.
Klara Koukalova beat Dutch qualifier Kiki Bertens 7-5, 7-6 (5).