Manchester United put a torrid week behind them by thrashing third-tier Tranmere 6-0 as holders Manchester City also cruised into the FA Cup fifth round with a 4-0 win over Fulham on Sunday.
United boss Ole Gunnar Solskjaer was badly in need of a convincing performance after 2-0 defeats to Liverpool and Burnley in the Premier League over the past seven days.
Many tipped the Red Devils to get bogged down on a sandy surface at Prenton Park, but a flying start thanks to a host of unlikely goalscorers ensured there was no chance of an upset.
Captain Harry Maguire led by example by striding forward to smash home his first goal for the club since an Sh12 billion ($105 million) move from Leicester.
Diogo Dalot then also grabbed his first United goal before Jesse Lingard curled home for just a second time in a year for club and country inside 16 minutes.
Phil Jones then nodded home his first United effort since 2014 and Anthony Martial's deflected strike made it five before the break.
Solskjaer could then afford the luxury of resting Martial, Maguire and Nemanja Matic for most of the second half ahead of Wednesday's attempt to overturn a 3-1 first leg deficit against City in the League Cup semi-finals.
Tahith Chong was one of those introduced and he was brought down by Tranmere goalkeeper Scott Davies, allowing Mason Greenwood to score United's sixth from the penalty spot.
City manager Pep Guardiola hopes more fans show up at the Etihad Stadium for the derby in midweek after questioning why there were 15,000 empty seats for his side's stroll past Fulham.