Fight Night Round 4

There's a trick here that I haven't actually found anywhere else.

When you're adjusting the sliders, move Boxer Power up, but move Boxer Toughness *DOWN*. This was completely counterintuitive to me, but it made all the difference since it affects both you and your opponent.

Against Ali, make sure that your boxer is about 6' 4" with a very long reach, so that you stack up well physically.

Set your round to a minute and the length to one round. G.O.A.T. difficulty, as specified in the achievement.

Go straight after him at the bell. Throw hooks to the head and as many punches as you can as fast as you can. With some luck, you should be able to knock his health down quickly and possibly knock him down. If you can do that, then retreat for the rest of the round with your block up and you should win by decision.

But make sure that Toughness slider is down. That helped me go from getting knocked down repeatedly to winning the fight in one game.

change the difficulty to g.o.a.t then there change the statistics of ur boxers punches to full and damage to full then make sure u turn down the opponents skills to zero aswell.create a fighter so that he is 6'8 and about 250 so his punches will be stronger and his reach will be further then Ali.keep doing jabs and straights.turn down the rounds to one and the minutes to one aswell and pray you will hit him enough to win

The way I got this with my created heavyweight was I had high rated power in both hands, 6'5 and about 250 pounds, with decent footwork as well.
Set the round to 1, at 1 minute in length. Everytime I got a little close to Ali, i would do a haymaker at his body, with fairly decent success, then run away. I did this for the whole round, and got it first go. Hope this is helpful.

heres a video in the link below. this is for about 10 achievements.

but in the video its says when you fight tyson or ali leave the rounds at 10, but it is better if you put the rounds at only 1 round, for 1 minute. trust me, you'll get it quicker.

OK so this won't be all that easy but it is do able first when making your created character you want to make sure he has good power as well as stamina and toughness because Ali is a taller fighter he has a longer reach. When setting up the match you'll want to change the settings to make the damage, speed, accuracy up to the max what you want to turn down is cpu defense and punch output also change it to one round one minute. Now for the fight since the AI will make Ali punch then move more because of his reach and speed you'll need to get on the inside and go for his body, this will cause his stamina to go down. I wouldn't try and go for a knockout it's really difficult to do. Also you can win this achievement with a decision win GOOD LUCK!

I found the easiest way to do this was to set the game to 1 round and 1 minute, then punch Ali straight away then get out of there and skip around the ring for the rest of the time! I landed 1 punch, and because Ali didn't land any, I won on points!

As above, I set the round counter to one and the time to one minute. I knocked him down on the first punch (seems to work jumping straight in with a haymaker). I then just defended, with the odd jab thrown in. This worked with Tyson as well.

I've now done this three times and can confirm that if you are quick off the mark then this is an easy takedown!