What is semi-automated offside? All you need to know about the technology ahead of it being used in the FA Cup fifth round

More from Sports

• LaLiga call in the European Commission to investigate Manchester City as their chief accuses Premier League champions of an Enron-style financial scandal

• Ben Shalom reveals Eddie Hearn has NOT apologised for shoving him after Chris Eubank Jr smashed an egg into Conor Benn's face - and slams clause in fight contract that 'shouldn't be allowed in boxing'

• Eddie Howe provides Alexander Isak injury update after striker missed Liverpool clash - and insists Newcastle are NOT over-reliant on star man

• Meet Rod Stewart's other son you've never heard of... and he's taken a very different career path to his older brother Sean after reality TV star checked into Malibu rehab facility

• DOUBTERS TO BELIEVERS REVIEW: Liverpool fans may love the documentary on Jurgen Klopp's era - but here is why it doesn't compare to all these others, writes LEWIS STEELE

• Fenerbahce announce lawsuit after Galatasaray accused Jose Mourinho of racism - as club launches appeal against Turkish Football Federation punishment

• Ruben Amorim issues five-word response to Roy Keane criticism of Bruno Fernandes - after club legend's rant labelled Man United stars as 'f***ing imposters'

• European Commission respond to LaLiga's call to investigate Man City after their chief accused Premier League champions of a financial scandal

• Ruben Amorim reveals Alejandro Garnacho will buy Man United stars dinner after his reaction to his substitution against Ipswich - as head coach warns 'perception is important'

• Roy Keane EXPLODES at Ian Wright in his angriest-ever punditry moment in row over Bruno Fernandes and Man United's team of 'f***ing imposters'

• Revealed: The 'real reason' Alejandro Garnacho stormed down the Man United tunnel as new footage emerges

• Tomas Soucek reveals touching reason he didn't use his trademark celebration after scoring for West Ham against Leicester

• Ollie Bearman suffers FREAK issue on final day of pre-season testing in Bahrain - as Brit is forced to return to pits in early setback

• F1 Testing is stopped twice as BUS drives onto Bahrain track - after a pane of glass SMASHED on the circuit

• Cole Palmer's answer to being asked about the sandwich he would choose in a supermarket meal deal goes viral

• Jos Buttler RESIGNS as England captain after crashing out of Champions Trophy

• Riled-up Pep Guardiola refuses to answer questions on Man City being reported to the European Commission over 'Enron-style' financial scandal claims

• Ex-England international reveals he 'needed to ESCAPE' Man United after suffering 'a big breakdown' as former star opens up on mental health battle

• Arsenal 'hold talks with Bayern Munich superstar' after Germans brutally WITHDREW new contract offer

• Heartbreaking childhood tragedy behind singer of Arsenal's North London Forever