Lee McGregor ousted his teammate Scott Kas Harrow in a controversial split decision to add the British bantam title to his Commonwealth zone after a massive battle.
With two judges winning the fight 114-113 in favor of each boxer, the third proved crucial – with McGregor taking 115-112 to the Emirates Arena in Glasgow.
It is Harroc's first defeat in 14 fights, while McGregor is now 8-0.
"My strong finish overcame me in that fight. My heart and my desire, ”said McGregor, 22.
Jarrock, 23, appeared to have done enough in his hometown after putting down the cleaners of the cleaner, and the verdict was met with shock by many in the capacity crowd.
But after being added to the standings for the 10th round, Edinburgh fighter McGregor was able to powerfully unite the straps. And he dedicated a thrilling victory to a family member who recently died.
"I want to pay special attention to my aunt, my father's sister, whose birthday was tonight," the 22-year-old said. "We just discovered the terrible news this weekend that she died.
"I had a terrible week, I was gaining weight, I was dealing with it. I feel like I had an army with me tonight and that's what drew me in. "
Announced as the biggest Scottish period in a decade, the fight has not disappointed. McGregor tried to push early, but was hit on his heels by three big blows by Harrow in the second round.
McGregor reacted well, opening the cut under his opponent's right eye, before landing in the seventh-place big-letter referee. However, Farouk's superior employment helped him regain momentum, and his "jumper" proved to be an effective weapon.
After the refusal, McGregor, perhaps feeling that he needed a knockout, went to rehearsals and the couple traded blinking blows to the last outfield.
"I would have been convinced I had won the fight, but with the exception I knew it would be very close," McGregor added. "Kas fair game, he is a very boyish guy and he kept coming and pushing hard.
"The judges have not sinned" – they respond
Former world champion in the World Championships in the World World and World Basketball Championships, Alex Arthur
For me it was the wrong decision – I won the Farooq with a few rounds. I thought his better variety of work and cleaner punches and his ring dominance – he always kept going forward looking for something to happen – made him fight.
Most people like rings, seemed to think that Kash had won. But it was an incredible fight and both can become world champions.