US boxer Claressa Shields continues to stand alone, after the two-time Olympic gold medalist successfully defended her undisputed heavyweight crown with a dominant win over New Zealand fighter Lani Daniels by unanimous decision on Saturday.

"I hit Lani with some big shots," said Shields following the win. "I broke her to the body, I broke her down to the head — I mixed it up on her."

"Lani is just very, very tough, and I knew she would be tough just from watching her fights and I could tell she worked on her speed," Shields acknowledged afterwards. "She fought a hard fight."

With a 17-0 record, including three knockouts, Shields is the first boxer — man or woman — to achieve undisputed status in three weight classes.

"I'm ready for anyone. I want the biggest and best fights out there," said Shields. "I'm going to stay at heavyweight and hopefully get the big fights with Franchon Crews, Che Kenneally."

Even more, the ambitious 30-year-old is next targeting a fight with the undefeated Laila Ali, hoping to lure the 47-year-old out of retirement by putting up $15 million for the clash.

"Hopefully [Ali] saw the fight tonight and says, 'You know what? I think I can take her,'" said Shields. "So, hopefully she saw it tonight and tells us yes, but I just want to make the best fights and the biggest fights, and that's against whoever."

Undisputed super lightweight champion Katie Taylor defeated Amanda Serrano in the boxing legends' third-straight fight on Friday, winning the highly-anticipated rematch by majority decision.

In front of 19,721 fans in Madison Square Garden, Taylor capped the pair's rivalry just over three years after meeting in the first-ever women's headliner fight at the iconic New York venue.

"I can't believe that this is my life," said Taylor after the clash. "I'm headlining the show at Madison Square Garden. I'm looking back on the whole journey. What an absolute, what an amazing life. These are nights that I dreamed of as a kid and sitting here again as a winner. I'm so happy, so grateful."

While the 39-year-old Irishwoman retained her world championship titles in the bout, Taylor had to battle as the 36-year-old Puerto Rican, who holds world titles in over four weight classes, kept the 30 rounds tight.

While Taylor ultimately took home top honors, Most Valuable Promotions co-founder and CEO Nakisa Bidarian, whose company presented the Friday event, made it clear that "Nobody lost tonight."

The night's biggest winner was the sport itself, as Taylor and Serrano's third and final contest led an all-women's card with 17 world titles on the table — a historic moment that Taylor does not take for granted.

"We created history together three times," Taylor said about Serrano. "My name will always be embedded with hers forever. I'm very, very happy about that."

"What we've been able to create over these last few years has been unbelievable," she continued. "It's amazing to have a rival like that in the sport. And this has brought [the world to] an event like this tonight, an all-female card, because of what myself and Amanda have been able to do to produce over the last few years."