Robbie Barrett captured the British Lightweight title from Scott Cardle with a majority points victory at the SSE Hydro in Glasgow.
Previously-unbeaten Cardle was looking for the win to secure the Lonsdale Belt outright and it looked like he was on his way when the Yorkshireman took two counts of eight.
However, a cut opened up at the side of Cardle's eye in the fifth round which appeared to turn the fight in Barrett's favour.
At the end of 12 thrilling rounds, one judge called it a 114-114 draw but the other two scored it 114-112 and 115-113 to Barrett.
Cardle, 27, looked impressive in the early rounds and when his opponent took a standing count in the second round it looked ominous.
The Lytham St. Annes fighter was quicker and more accurate in the clinches and in the fifth round Barrett again had to take a count after going down.
Cardle, however, ended the round with cut over his left eye as Barrett revealed evidence of his own craft.
The 25-year-old grew in confidence, encouraged by the blood which flowed from his Cardle, whose fans had grown quiet in their anxiety.
Cardle was taking as many shots as he was delivering and as the fight entered the final rounds, the two fighters slugged it out, leaving themselves exhausted by the end, but with Barrett and his corner jubilant.
Charlie Edwards won his British super-flyweight fight against Iain Butcher on all three judges scorecards.
Butcher, from Motherwell, had apologised after he had failed to make the weight for contest and consequently, only the Englishman was fighting for the vacant title.
Both boxers had sparred together in the past and it showed in the cagey opening stages and the contest appeared be fairly even by the midway point.
However, Edwards worked diligently and with some precision to come through and take the belt although the showboating Ali-shuffle in the last round was out of keeping with the contest which was scored 120- 108, 120-109 and 120-108 in his favour.
Josh Kelly made an impressive start to his professional career, dominating Jay Byrne over six rounds.
Kelly, one of Team GB's Rio 2016 team, will be on the undercard of Anthony Joshua vs Wladimir Klitschko on April 29, with former Olympic team-mates Lawrence Okolie and Joe Cordina also on the Sky Sports Box Office bill.
Kelly was keen to impress the Scottish crowd and, as soon as the bell sounded, his sharp jab found the target.
There were times when Byrne - who took London prospect Felix Clash six rounds last month - tried to smother the debutant and it did work.
Kelly, though, clearly does not lack confidence and in the third a slick three-punch salvo with the left hit home and reminded his opponent who all eyes were supposed to be on.
With Adam Booth in his corner, the class came out in the fourth with Kelly landing an uppercut alongside more combinations - before he came close to marking his debut with a knockdown in the fifth.
A sizzling right-left salvo wobbled Byrne but, to his credit, he was smart enough to step out of danger and remain standing at the end of the six-round fight.
Lawrence Okolie put on another explosive performance, stopping Lukasz Rusiewicz inside the first round.
The Hackney cruiserweight - who will be heading to Sheffield to spar with Anthony Joshua - did not quite finish it in 20 seconds, unlike his debut victory over Geoffrey Cave.
It took Okolie almost a minute and a half to put experienced Pole Rusiewicz down for the first time, a clubbing right doing the damage.
Rusiewicz was straight up but, moments later, a left to the body had him down for the second time.
It was a matter of when, not if, Okolie was going to blast to 2-0 but with nothing to lose, his opponent did catch him with an overhand right that seemed to rock him.
The Rio 2016 star simply made Rusiewicz pay the price, this time a hammering straight right seeing the Pole wobble and another shorter shot forcing the referee to step in.
Earlier, Charlie Flynn's first professional title fight against Ryan Collins was declared a technical draw after he sustained a cut in a clash of heads.
Flynn looked fine in the first couple of rounds of the Celtic Lightweight title fight but reeled when he collided with Collins' head and the nasty cut was considered too severe for him to continue.
On his official Twitter account, Flynn said: "Disappointing tonight!! 25 stitches after taking an illegal head butt."
The Gorbals' Joe Ham won the Scottish Super-Bantamweight title with a 99-92 points win over Scott McCormack.
