Liverpool and Everton are set to meet at Anfield on Saturday.
The Dutchmen worked with each other at Feyenoord.
Everton were heavily linked with a big-money move for the Sunderland centre-back but would he improve Ronald Koeman's options?
Everton could only manage a 0-0 draw with Middlesbrough today.
Everton won against Southampton in the Premier League on Monday afternoon.
Everton's Ramiro Funes Mori has generally been used as a back-up option since Ronald Koeman took charge.
The Everton player played to full 90 minutes as his country went down 3-0 to Brazil in World Cup 2018 qualification.
The defender has struggled to break into the first team this season.
The Everton defender has been tipped for the role by a national legend.
It takes a brave man to criticise Messi. It takes an even braver one to want a hugely erratic defender be given the chance to lead the nation instead.