Errol Spence Jr and Terence Crawford were involved in a war of words on social media Photo Credit: Ryan Hafey/Premier Boxing Champions/Mikey Wiliams/Top Rank via Getty Images A Welterweight unification clash between Errol Spence Jr and Terence Crawford is at the top of the wish list of almost every boxing fan for 2021. WBO champion, Crawford and unified WBC and IBF titlist, Spence Jr were embroiled in a social media war of words on Thursday, as the pair debated resumes and ramped up the appetite for a mouthwatering showdown. Crawford made a fourth defence of his WBO crown, stopping Kell Brook in four rounds in Las Vegas in November, whilst Spence Jr returned from a horrific car crash to dominate Danny Garcia in December to retain his WBC and IBF titles, a bout his rival was in attendance for.