( CNN ) -- An eagerly-anticipated clash between two of the greatest boxers of the modern era looks likely to happen this year if the two camps can compromise on a date . U.S. boxer Floyd Mayweather Jnr took to his Twitter account this week to throw down the gauntlet to Manny Pacquiao , calling on his arch-rival from the Philippines to `` step up punk '' for a May 5 fight . But Pacquiao 's official website said that the 33-year-old wanted a date at the end of that month . And Filipino broadcaster ABS-CBN reported that Pacquiao 's adviser Michael Koncz said late May was preferable so that a temporary outdoor stadium could be constructed in Las Vegas to maximize revenue from the showdown . However , Pacquiao 's business manager Eric Pineda told CNN that the fight might not take place until November . `` It 's not going to be in May , '' Pineda said on Thursday . `` As far we know , he ( Mayweather ) has a jail term to serve . With a November date , he can still do a lot of training in jail . '' Mayweather was sentenced to a 90-day prison term after being found of domestic violence , however a judge in Nevada ruled last week that the Mayweather could postpone reporting to jail until June because he had already lined up a fight date in May . Mayweather faces jail for domestic violence . Mayweather chose Twitter to issue his challenge to Pacquiao . `` Manny Pacquiao I 'm calling you out let 's fight May 5th and give the world what they want to see , '' he wrote on Tuesday . `` My jail sentence was pushed back because the date was locked in . Step up punk . '' The two fighters have had a famously rancorous relationship . Last year , Pacquiao filed a lawsuit in a federal court in Las Vegas for defamation against Mayweather and others for allegedly claiming he had used performance-enhancing drugs . Pacquiao had been infuriated by the insistence of Mayweather and his team at Golden Boy Promotions that both fighters submit to Olympic-style blood testing in the buildup to a previous `` super fight . '' The talks between the two parties broke down . `` Floyd Mayweather is a coward . He will never fight anyone that will remotely give him a tough fight , '' Pacquiao 's promoter Bob Arum said at the time . The 34-year-old American boxer has won all 42 of his professional fights ( 26 by knockout ) but Pacquiao , 33 , also has an impressive record with , with 54 wins from 59 bouts -- 38 by knockout -- plus three losses and two draws . He is the first boxer in the sport 's history to have won world titles in eight weight divisions and recently launched a successful political career after being elected to the Philippine House of Representatives in June 2010 . Pineda said the details of the much-vaunted fight between Mayweather and Pacquiao were still being studied . `` We have n't seen a contract yet . It 's all still on the drawing board , '' he said .
Super fight between Mayweather and is likely to happen later this year . Mayweather has challenged Pacquiao to a fight on May 5 before he goes to jail . The American boxer has a 90-day sentence to serve for domestic violence . A judge ruled that Mayweather should delay reporting to jail until later .