He turned professional in 2007 and was promoted by Warriors Boxing and Top Rank. One defense was made of both titles in 2013, when Allakhverdiev defeated Souleymane M"baye via late-rounds stoppage. In 2014, Allakhverdiev suffered his first professional loss in a closely contested bout against Jessie Vargas, which went the full twelve-round distance.
He is a former IBO and WBA light welterweight champion. As an amateur he won a bronze medal in the lightweight division at the 2005 World Amateur Boxing Championships, Allakhverdiev won bronze at the 2005 World Amateur Boxing Championships in the lightweight division, losing to eventual winner Yordenis Ugáson His biggest accomplishments came in 2012, when he first won the IBO junior welterweight title against Kaizer Mabuza, knocking him out in four rounds. The following year he stopped then-undefeated Joan Guzmán to win the WBA super lightweight title.
