MONTREAL — Christopher Guerrero won a 10-round unanimous decision over grizzled Mexican Oliver Quintana to win the vacant WBC Continental Americas title at the Montreal Casino, Montreal on Thursday on ESPN+

The 23-year-old landed the eye-catching punches throughout and dropped Quintana in rounds 5, 7 and 10 on his way to a 99-88, 98-89x2 decision on the scorecards.

"I told you I was going to win it," Guerrero said to promoter Camille Estephan and the two embraced in a heartfelt moment.

He later praised four-weight world champion Terence Crawford, who was in attendance: "It was an honor to fight in front of the world's best boxer."

Despite the wide nature of the scorecards, Guerrero had to work for the fight throughout and as early as the second round was sporting a slight abrasion over his left eye.

The action heated up in the third, a big left hook snapped Quintana back. The two exchanged combinations and then the visitor shipped a right hand but remained unmoved.

However, it wasn't for long, the Mexican was hurt in the fifth round and then dropped by a rapid-fire combination but was able to last the remaining few seconds to see out the round.

Over the next round or so, Guerrero began to look a little fatigued before his second wind kicked in.

Quintana touched down a second time in the seventh from a rather innocuous punch that looked more a slip than anything Guerrero did.

An invigorated Guerrero sprang to life and was looking for the late knockout and though he did get another knockdown wasn't able to force the stoppage.

Mary Spencer retained her WBA junior middleweight title with a 10-round unanimous decision over Venezuela's Ogleidis Saurez.

Spencer, rated at No. 4 by The Ring at junior middleweight, returned to her roots from her amateur days and used her skills as opposed to brute force which has seen her thrill at times but also struggle with movement at times.

The 40-year-old looked loose and boxed with her jab and used the ring to dictate the action. Though Suarez also had some joy with Spencer sporting a red cheek courtesy of getting caught.

Spencer had the better of the action and that continued in the early to mid-rounds, though was bleeding from the nose. Suarez, who has been a professional since 2006, used all her experience to stay in the fight even if it wasn't winning her rounds.

In the later stages, when it looked like Spencer could look for the stoppage, she instead continued to box and maintained her composure and ran out a worthy winner. When it went to the scorecards Spencer was awarded the decision 100-90x2 and 99-91.