Canelo Alvarez was forced to kick out two Jake Paul fans who made it into the ring after the fighter's knockout win over Avni Yildirim.Alvarez, who was in his first bout since victory over Britain's Callum Smith in December, totally dominated the fight's early exchanges.The Mexican middleweight floored Yildirim with a deadly left-right combination in the third round which forced his opponent to retire before the fourth round.