Manchester United and Liverpool's rivalry is so fierce that only nine players have gone directly from one club to the other.
Phil Chisnall's £25,000 from United to Liverpool way back in 1964 was actually the last instance of that happening.
There was a time where Argentine defender Gabriel Heinze wanted to join Liverpool in 2007 but Sir Alex Ferguson refused to allow the move.
Yet recently there has been activity between English football's two big guns as United have signed 16-year-old Ethan Ennis from Liverpool.
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The youngster announced his big move on Tuesday, revealing his delight over signing for the 13-time Premier League winners.
Ennis, an attacking midfielder, looks incredibly exciting and has an evident desire for getting in the box and scoring goals.
In the FA Youth Cup, where Liverpool reached the final before being beaten 2-1 by Aston Villa, Ennis was a key part of that team and scored a hat-trick against Sutton United in the third round.
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He rejected a new contract at Liverpool and courted interest from Chelsea, before United came calling and snapped him up.
United have not yet paid a sum to Liverpool but according to the Daily Mail, the Reds will demand a development fee for the starlet.
It could end up being that the matter heads to a tribunal should the two clubs fail to come to an agreement.
United's capture of Ennis follows on from their addition of Charlie McNeill from Manchester City. The striker had scored over 600 goals in the City academy set-up before sealing a £750,000 move across town last year.
In his first season at United, the 17-year-old hit 24 goals in 21 games in the U-18 Premier League - including four against his former employers.
Featured Image Credit:Topics: Liverpool, Football, Manchester United, Premier League