Naturally, that would be an issue at any point in time, but with a European Championship just around the corner, it could prove to be a huge blow for several top nations in that tournament, should the ban be enforced.
And England would be right there among the sides left decimated.
In Gareth Southgate’s most recent squad, he selected 16 players who represent clubs who have expressed their intention to join a Super League. That figure includes Jesse Lingard, who is on loan at West Ham from parent club Manchester United.
As such, there is a very real possibility that the Three Lions may have to put together a squad of players this summer who are not associated with the so-called ‘Big Six’.
But what would that squad look like, and who would make the cut?
With the likes of Harry Kane, Marcus Rashford, Raheem Sterling, Harry Maguire, John Stones, Phil Foden, and countless others at risk of being ruled out – through no fault of their own, might we add – there will be sizeable vacuums that need filling with players from clubs that might otherwise be under-represented by the national side, including Leeds United.
We’ve taken a closer look at which Elland Road talent Southgate could turn to this summer – click and scroll through the pages below to see our squad.

7. Matt Targett
Joins his Villa full-back partner Cash in the squad. Justin James, of Leicester, misses out with a knee injury. (Photo by Clive Brunskill/Getty Images) Photo: Clive Brunskill

8. Conor Coady
The Wolves centre half is not only in the squad, he's got the captain's armband. (Photo by Michael Regan/Getty Images) Photo: Michael Regan

9. Michael Keane
The Everton centre-half has international experience and has been in good form this season. (Photo by Clive Brunskill/Getty Images) Photo: Clive Brunskill

10. Tyrone Mings
Would probably have been in Southgate's squad anyhow, but is a definite in the absence of Maguire, Dier and Stones. (Photo by Clive Brunskill/Getty Images) Photo: Clive Brunskill

11. Lewis Dunk
Just the one cap for England in the 3-0 win over USA in 2018, but the Brighton skipper gets the nod. (Photo by Phil Noble - Pool/Getty Images) Photo: Pool

12. Ezri Konsa
Highly-rated Villa centre-half has been unfortunate not to be called up so far. Pips Burnley's James Tarkowski for the final centre-half spot. (Photo by OWEN HUMPHREYS/POOL/AFP via Getty Images) Photo: OWEN HUMPHREYS

