According to reports, the midfielder’s representatives are set to arrive in England on Monday to finalise a move to the Premier League.
The 26-year-old needs to leave Atletico Madrid in order to play regular first-team football, and a move to Manchester United or Liverpool could be ideal for him.
The Red Devils are in a pole position to sign him.
Despite his struggles last season, Saul is a quality midfielder, and he has the potential to transform the two Premier League sides.
Initially, the player was linked with a move to Barcelona, but the Catalan giants failed to reach an agreement with Atletico Madrid.
Manchester United will have to bring in quality midfield reinforcements this summer, and a hard-working midfielder like Saul would be the ideal addition alongside Paul Pogba and Bruno Fernandes.
Meanwhile, Liverpool need to find a quality replacement for Gini Wijnaldum, and the Spanish international certainly fits the bill.
Both Premier League clubs have the resources to sign the talented Spaniard, and it will be interesting to see where he ends up eventually.
Saul has a release clause of around £125m, but the Spanish champions are prepared to let him leave for a fee of £40m this summer.