Kim Ji-won of "Queen of Tears" and Kim You-jung of "Dear X" are going head-to-head on weekend television, returning with dramatically different roles after acclaimed performances in their previous series. Kim Ji-won stars as a brilliant surgeon in SBS' new Friday-Saturday series "Doctor X: Mafia in White," while Kim You-jung transforms into a master pickpocket in tvN's 20th anniversary special project "100 Days of Deception." The two dramas premiered just one day apart, with "Doctor X" airing its first episode Friday and "100 Days of Deception" following Saturday. Their schedules put the two stars in direct competition on Saturday nights, adding another high-profile matchup to the weekend drama race. Expectations are particularly high because both actors are coming off performances that marked significant moments in their careers. Kim Ji-won returned to a leading television role about two years after the hit tvN series "Queen of Tears," in which she played Hong Hae-in, a third-generation chaebol heiress confronting love, loss and a life-threatening illness. Her performance, which shifted