Floyd Mayweather moves to 48-0 and becomes the unified welterweight champion of the world following a unanimous decision victory over Manny Pacquiao at the MGM Grand in Las Vegas
Leo Santa Cruz and Vasyl Lomachenko record comfortable victories on the televised undercard
Mayweather confirmed in his post-fight interview that he intends to honour his commitment by competing with Showtime once more in September before stepping away from the ring as he approaches 40.
Pacquiao, meanwhile, seemed strangely confused that he had not won despite the judges' cards and the opinions of most at ringside and across social media.
He insists that Mayweather's size advantage was not a factor in the outcome, although did seem to concede that his speed and ability to move around the ring made it difficult.
That is all from us, but further reaction from both fighters and a report will follow on IBTimes UK shortly so stay tuned.
Scores of 118-110, 116-112, 116-112 secure the win for Mayweather and he moves to a formidable 48-0. Pacquiao looks to accept the decision.
Floyd Mayweather wins via unanimous decision
With the crowd vociferous in their support of Pacquiao, Mayweather is certainly the pantomime villain in the MGM Grand. Judges decisions are pending.....
Round 12: A smile on the face of Mayweather as he continues to effortlessly dance around the ring and he clearly thinks he has won the fight as he raises his fist in the lead-up to the final bell.
Only the most questionable of judging controversies will deny him a deserved victory.
Round 11: Near domination from Mayweather behind that useful jab and this fight looks utterly beyond Pacquiao, who will need to record his first knockout in six contests in order to snatch victory from the jaws of defeat.
Round 10: Better from Pacquiao as he pushes Mayweather back towards the ropes with a couple of good body shots but his flurries just do not seem to be having the desired impact.
Two rounds remaining for Pacquiao to save this.
Round nine: Still largely much ado about nothing for Pacquiao, despite his best efforts. Mayweather is a master of the craft and is just not letting him land nearly enough clean punches to influence the judges.
Round eight: A few technical difficulties here during the eighth, but it was another round where Mayweather seemed to dictate the tempo and again fought on his own terms. He appears comfortably ahead here and Pacquiao needs to find another gear if he is to avoid defeat.
Round seven: Mayweather boxing smart at the start of the seventh and connects with a few right jabs.
Pacquiao registered another jab and missed with a left hand but Mayweather is still intent, understandably, on staying out of harm's way for as long as possible.
Round six: Mayweather spends most of his time in round six backed up against the ropes after receiving a strong left hand.
Pacquiao does his best to throw a number of heavy shots, yet Mayweather shakes his head in defiance as a signal that it will take much more than that to threaten a knockout blow.
We have it at 4-2 in favour of Mayweather heading into the seventh.
Round five: A relatively quiet round as Mayweather keeps Pacquiao at a safe distance by virtue of his impressive speed. An exchange between Mayweather and Bayless occurs before the start of the sixth.
Round four: Breakthrough for Pacquiao as he rocks Mayweather with a hard left before unleashing a flurry of shots as his opponent hoists his hands up and backs against the ropes. He badly needed that and the crowd has come alive.
Round three: A lot of holding from Mayweather but no reprimand from referee Bayless so far. Pacquiao just cannot get close enough to do any real damage and Mayweather, who uses his right hand to good effect, is looking extremely comfortable.
Round two: Another round for Mayweather as he prevents Pacquiao from getting in close. The two occasions the former was caught on the ropes, he escaped first with a hold and then with quick footwork.
Pacquiao did try and throw a few punches there, but he barely landed with anything and he might start to get reckless if this continues in a similar vein.
Round one: A confident start for Mayweather as he keeps the fight in the centre of the ring and lands with two hard right hands. Pacquiao struggled to get anything going whatsoever in the first three minutes.
Kenny Bayless has had his say, gloves are touched and the bell sounds. The most lucrative fight in boxing history is underway. Savour it, folks....
The build-up has been simply agonising at times, yet there is a real sense of anticipation now the time for this fight has finally arrived. The introductions are over and the meaningful action is now just seconds away.
As well as Bieber, Mayweather is also being accompanied to the ring by that terrifying masked chap from the Burger King adverts.
Despite his fans seeming to be the dominant force in Vegas this week, Pacquiao's supporters seem more prevalent inside the arena now and there are a few boos for the current pound-for-pound champ.
Here comes Pacquiao to a suitably raucous reception. As usual, there is an infectious grin plastered across the 36-year-old's face and you get the feeling he is genuinely delighted that this fight has finally come to pass.
With the Mexican and Filipino anthems already complete, Jamie Foxx is now belting out the Star-Spangled Banner accompanied by an organ and a montage.
You may notice that there are two different announcers at the MGM Grand tonight, with Michael Buffer working on behalf of HBO and Jimmy Lennon Jr for Showtime.
It sounds like the keenly-anticipated ring walks are finally imminent. The national anthems will come first, as usual, with Pacquiao then set to walk out to 'Lalaban Ako', a song he composed and recorded himself.
Mayweather's entourage will once again feature none other than Justin Bieber, with the Canadian singer set to carry his friend's championship belt to the ring.
Bar a few harsh words exchanged by other members of their respective camps over recent months, there has been a distinct lack of animosity in the build-up to this contest between Mayweather and Pacquiao, despite the former engineering a 60-40 split by virtue of being the bigger draw and the two having disagreed frequently over issues such as Olympic-style drug testing in the past.
Mayweather goes into the ring tonight as the favourite, with many believing that Pacquiao's best chance of beating the five-division champion may have already passed.
Highly-respected trainer Freddie Roach insists that he and his prize asset have worked on the perfect gameplan, however, one that presumably includes the prospect of using his power and unrivalled tenacity to secure a knockout as it seems very unlikely that Pacquiao will win if the fight lasts all 12 rounds.
It seems the fight has been delayed due to the overwhelming demand for PPV in the United States...