Belfast bruiser Caoimhin Agyarko stamped his authority on Ernesto Olvera right from the off, on Saturday 5th June. The contest was called before the start of the fourth round, with Olvera retiring on his stool. 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/btsportboxing Read more on upcoming fights on BT Sport and BT Sport Box Office ➡️ http://www.bt.com/sportboxoffice