It's the final day of phase one of the WBC Boxing Grand Prix in Riyadh and it's the turn of the heavyweights!

We've already seen the featherweights, junior-welterweights and middleweights go at it, but now it's time for the big boys to take centre stage at the BLVD City Global Theater.

As per competition rules, there are no draws and any fights scored even after six then go to a qualitative scoring system to determine who proceeds to the next stage of the Grand Prix.

Keep up to date with all the latest results below...

Mendoza grabs the win after a back-and-forth fight with Yang. Both men traded power shots throughout but it was the Argentine who landed the crisper punches, securing a unanimous decision win with scores of 57-56, 58-55, 58-55. Mendoza UD6.

Valenzuela started the fight well, landing some big counter-shots, but Krnjic's size came into play in the third. The Bosnian upped the pressure and landed huge shots to the body and head, sending Valenzuela to his knees in the process. He got up at the count of nine, but the referee decided to wave things off. Krnjic TKO3.

Brutal stuff as American Devon Young destroys Yuskiv in the second round with an absolutely huge right hand. Just before that, young had landed three rights in a row which stumbled the Ukrainian backwards before the fourth one sent him crashing to the canvas. Young TKO2.

Another straightforward victory as Brito beats Frenchman Gillet by unanimous decision. The fight was fairly pedestrian throughout, with Gillet struggling to threaten his Italian adversary, who used his front-foot pressure and power shots to win every round on the judges' cards. 60-54 x3. Brito UD6.

Argentine Vegara picks up an easy win, jabbing and power-punching his way to a dominant win on all three cards, each of which read 60-54. Vegara UD6.

He was shattered by the end of the fight, but Peter Lacz prevailed with scorecards of 59-55, 59-55, 59-55 to beat Michael Pirotton, advancing to the second round in the process. Lacz UD6.

In our first fight of the day we already have our first stoppage. Rogava launches a blistering body attack on his Australian opponent, who takes an eight count before getting back up to face more punishment, only for the referee to stop proceedings a minute later. Rogava TKO2.