Mikaela Mayer put her undefeated record on the line in what ended up being a close fight in Las Vegas. Subscribe to BT Sport Boxing on YouTube ➡️ http://www.youtube.com/c/btsportboxing Follow BT Sport Boxing on Twitter ➡️ http://twitter.com/btsportboxing Join our BT Sport Boxing Facebook Group ➡️ https://www.facebook.com/groups/BTSportBoxing/ Follow us on Instagram ➡️ http://instagram.com/btsport Read more on upcoming fights on BT Sport and BT Sport Box Office ➡️ http://sport.bt.com/bt-sport-box-office-S11364260381802