supporters in Australia have flown a banner over Manchester United
's open training session at the WACA in Perth
The plane cruised over Ole Gunnar Solskjaer's squad trailing the message: 'Liverpool FC - 6 X EUROPEAN CHAMPIONS.'
Jurgen Klopp's side have huge support down under and made their presence felt with a dig at their rivals, who had 12,000 fans watching training and the provocative banner above them.
It is unknown whether the small white aircraft was hired by one fan or a group of supporters.
But they timed the prank to perfection with the United players working hard on the famous cricket ground's turf below.
The Old Trafford club endured a dreadful campaign last season, a stark contrast to their old rivals who ran Manchester City close in the Premier League and then capped off their campaign with their sixth European Cup.
No doubt it was an untimely reminder for Solskjaer and Co, although perhaps it motivated them to push harder in their pre-season session.
The tourists had two training sessions at the ground, the second of which was open and allowed 12,000 fans to watch.
The ticketed event completely sold out, meaning the plane banner had maximum impact.
United are preparing for the first friendly on tour against Perth Glory on Saturday.
Yep. Somebody has actually hired a plane to fly this banner before Manchester United's training session at the WACA. Loving the shithousery ?? #LFC
— Alex (@pgfcalex) July 11, 2019
They are working hard to hit top condition for the start of the season where they will attempt to wrestle the bragging rights back from Merseyside.
United failed to qualify for the Champions League as they ended last term pitifully in sixth place on 66 points.
They were a mammoth 31 points behind Liverpool but many fans were relieved to see the Reds fall just short of the Premier League title.
That said, Klopp's side's triumph over Tottenham in Madrid put them three European Cup wins ahead of United, who have claimed three in their history.