@Denis, I can offer you some possibilities to root for in case of Fedal final:
1) Nadal fires a shot in Federer's chest, old man dies. Nadal is disqualified, nobody wins the tournament.
2) Federer fires a shot in Nadal's chest, it bounces back and hits the umpire. Federer is disqualified. Nadal jumps the net and physically assaults Federer. Nadal is disqualified too. Nobody wins the tournament.
3) Federer is leading by two sets to love. Carol invades the court, throw some kisses to the wind in Nadal's direction, and empties a 9 mm in Federer's body. Just afterwards she asks Nadal to marry her, he refuses, she grabs a second pistol, shoots him the knee, ask again, he refuses, the process goes on and he finally is killed. Nobody wins the tournament.
4) Nadal is leading by two sets to love. Darth and Front invade the court and Nadal dies with 1324 stabs on chest, face, biceps, eyes and naughty bits. Old man Federer has a heart attack when they run in his direction to hug him. Nobody wins the tournament.
5) Nadal and Federer decide to share the trophy because they are besties. The ARMA (Australian Real Macho Association) beats both guys to death before the joint trophy ceremony. Nobody wins the tournament.
6) Federer had beaten Chung in the semis. Somebody tells Kim Jong Un Chung has North Korean grand parents, and that he planned to dedicate the trophy to the almighty DPRK. He nukes Melbourne in revenge. Nobody wins the tournament.
7) Federer had beaten Tennys in the semis. Somebody tells Trump Federer is a libtard who hates white America, and always plays well against white Americans, showing him videos of the Roddick matches. He sends the CIA to kill Federer. They kill Nadal by mistake, but the Russians finish the job, seizing the opportunity (go Rublev!). Nobody wins the tournament.
8) Aliens land on earth before the final. Jesus Christ returns. Elvis returns (argh). The sun turns into a bubble gum of astronomic proportions. Maradona walks on water. Laws of physics change and Carbon-12 becomes an unstable nucleus. The end of all times arrives, and, most importantly,
nobody wins the tournament.
See? A lot of things to root for. You people just have too little faith.