By Ewan Murray The FA Cup third round got underway on Thursday night, but the bulk of the action comes this Saturday in England’s oldest cup competition. It continues to dazzle and amaze with annual giant-killings and sensational underdog tales, but the third round is where the FA Cup really starts to get interesting. While there aren’t a plethora of staggering ties this year, there are still some mouth-watering match-ups. One of the standout fixtures of the third round comes this Saturday in the first Tyne-Wear derby since 2016. Here is your guide to Saturday’s televised FA Cup clashes in the…