Melbourne [Australia], Jan. 27 : Fourteen-time Grand Slam champion Rafael Nadal on Friday came out with a spirited performance to overcome Grigor Dimitrov of Bulgaria to enter the finals of the Australian Open. Nadal defeated Dimitrov 6-3, 5-7, 7-6 , 6-7 , 6-4 in a hard-fought semifinal contest that lasted for almost five hours here at the Rod Laver Arena.