Australian born Fiji heavyweight boxer Kali Meehan is on top of the world.

Meehan last night knocked out American Dominique Alexander in the second round of the scheduled ten-rounder.

With this win, Meehan is now the top contender for the WBA heavyweight title.

Meanwhile, Russian giant Nikolai Valuev regained the WBA heavyweight world title in a split decision over America's John Ruiz in Berlin.

The 7ft tall, Valuev was awarded the fight by two of the three judges for his 49th professional win.