Italian Francesco Passaro staged a remarkable comeback at the Intesa Sanpaolo ATP Finals Wednesday, saving three match points to claw past countryman Matteo Arnaldi 4-3(7), 2-4, 3-4(4), 4-3(4), 4-3(8) in Milan. In a dramatic clash, Passaro rallied from 1-3 in the fourth set as he overcame heavy cramping to win