If you are a UFC fan you will not want to miss today's fight inside the Barclaycard Arena in Hamburg, Germany.
So what's happening? We have Former Ultimate Fighting Champion (UFC) Heavyweight champions, Andrei Arlovski & Josh Barnett.
Barnett has been away from fight action after losing his last bout. Arlovski rose to the top five before two knockout losses to the champion and No 1 contender.
Record: 26 - 12 (1)
Best wins: Travis Browne, Frank Mir, Antonio Silva.
Worst losses: Stipe Miocic, Alistair Overeem, Anthony Johnson.
Skills: Still one of the fastest men in the heavyweight division. Uses Sambo skill and big right hand.
Best wins: Frank Mir, Roy Nelson, Randy Couture.
Worst losses: Travis Browne, Ben Rothwell, Daniel Cormier.
Skills: A technical fighter and not the quickest or strongest heavyweight. A southpaw and will be looking to use brute force than get his opponent on the mat.
Only one of these fighters can be a contender for the heavyweight title.
Arlovski has only lost against the best but taken some hard losses in his career. If he can win this and a couple more bouts he should have a chance at the title.
Barnett is looking in great form and I would give him a slight edge to win this fascinating fight.