Hartfield sandwiched 6-2 set victories around a 3-6 loss.
American James Blake, who lost to Malisse in last year's final, is the top seed this week.
In other first-round action, American Robby Ginepri beat Frenchman Mathieu Montcourt 6-3, 6-0; Spaniard Ivan Navarro outlasted France's Florent Serra 6-3, 3-6, 6-3; Spain's Guillermo Garcia-Lopez defeated American Wayne Odesnik 6-4, 6-2; and Chilean Paul Capdeville beat American wild card Clint Bowles 6-2, 6-4.
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