Richard Sherman says an NFL lockout in 2021 is 'going to happen' Unknown 00:11 The 49ers cornerback opened up about a potential holdout in 2021 when the 10-year labor deal comes to an end, says it is 'going to happen.' Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsDubai Tennis Championships: Roger Federer begins quest for 100th career title with win over Philipp KohlschreiberLaLiga: Gareth Bale's lack of celebration after scoring puts spotlight on Welshman's uninspiring Real Madrid stintAnthony Joshua vows to 'strip Jarrell Miller of his soul' in world heavyweight bout in USA to defend IBF, WBA and WBO crownsUEFA begins disciplinary proceedings against Atletico Madrid manager Diego Simeone controversial celebrationEmiliano Sala plane didn't have commercial licence; Investigators unsure if David Ibbotson was authorised to fly at nightInternational Boxing Association approves new uniforms for female boxers to wear for religious reasons