It’s not a difficult journey between Liverpool and Manchester – unless you’re a footballer that is!
Only a few brave souls have managed to play for both United and Liverpool since the 1920s.
Everyone remembers the most recent – Michael Owen, Paul Ince and Peter Beardsley.
But what about players like Tom McNulty, Tom Miller and Tommy Reid? Or Ted Savage, John Sheldon and Fred Hopkin?
iNostalgia profiles some of the footballers who blazed a trail between the fierce North West rivals, starting with the first direct transfer Tom Chorlton in 1912.
Born in Stockport, defender Chorlton joined Liverpool from Accrington Stanley in 1904.
He made only 117 senior appearances in eight years at Anfield, but managed to notch up eight goals as the nominated penalty-taker.
Scottish international Tom Miller joined Liverpool from Hamilton Academical for £400 in February 1912.
The lively inside forward helped the Reds reach their first FA Cup final at the Crystal Palace ground in 1914. They lost 1-0 to Burnley.
Miller’s career was interrupted by the First World War, but he returned to the club in 1919 only to transfer to United the next year. He played 25 times for the Red Devils.
Miller’s goals-per-game ratio at Anfield was remarkable. He netted no less than 56 times in 146 appearances.
Also playing in the 1914 FA Cup final was winger John Sheldon, who came from United to Liverpool in 1913. He made 147 appearances for the Reds, scoring 20 goals.
Winger Fred Hopkin spent ten years at Anfield after joining from United for £2,800 in May 1921. He played 335 senior games and scored 10 goals.
Scot Tommy Reid started his career with Liverpool, but transferred to United in 1929 after being loaned out to Oldham Athletic. He scored 67 goals before rejoining Oldham in 1933.
Centre-half Allenby Chilton briefly joined Liverpool as an amateur from Seaham Colliery in 1938, but never played a senior match for the Reds.
He crossed to United the same year, playing 352 games for the Red Devils before moving to Grimsby Town in 1955. He was made captain in 1953.
Salford-born defender Tom McNulty moved to Liverpool from United in 1954 for a transfer fee of £6,000. He made 36 appearances for the Reds.
The last man to transfer directly between the two clubs was inside forward Phil Chisnall, who left Old Trafford for Anfield in 1964. He played only six times for Liverpool before signing for Southend United in 1967.
Wing-half Ted Savage came to Liverpool from Lincoln City in May 1931 and scored twice in his debut against Grimsby at Anfield. His brace helped secure a 4-0 victory.
They turned out to be the only goals he scored during his time at Anfield as he struggled to make the first team. He left for United midway through the 1937-38 season.
Savage did manage to feature in a remarkable team photo taken on Liverpool’s 1936 end-of-season tour to the Balkans.
The Reds were forced to play Beogradski SK topless due to a kit clash, so they lined up bare-chested before the match.
Standing two spaces along from Savage was another player who’d make a colossal impact at United – but not as a player…
It was none other than future manager, European Cup winner and revered club legend Matt Busby!