The new Manchester United boss saw his Holland side sweep past Spain, Australia and Chile in Group B to go into the knockout stages with maximum points. They now face Group A runners up Mexico in Fortaleza on Sunday in a bid to reach the quarter finals – far further than many suspected given that the Dutch have such a young, inexperienced squad this time around.
Unsurprisingly, a number of the Dutch stars from the World Cup squad have already been linked with moves to Old Trafford with van Gaal, including defenders Daryl Janmaat, Bruno Martins Indi and Daley Blind, midfielders Nigel de Jong, Jordy Clasie and Wesley Sneijder, as well as forwards Arjen Robben and Memphis Depay.
Yet Sunday's encounter could put another potential transfer target in the limelight – and this time, he'll be on the opposing side.
Mexican centre back Hector Moreno has so far been one of the stars of the Mexican defence, who have conceded just one goal in the tournament so far – a late consolation for Croatia when Miguel Herrera's side were already 3-0 up and coasting through to the knockout rounds. Alongside the experienced Rafael Marquez and Francisco Rodriguez, Moreno has formed an outstanding three man back line, with wing backs Miguel Layun and Paul Aguilar supporting.
Goalkeeper Guillermo Ochoa has been receiving most of the attention after a stunning performance against Brazil, but Espanyol defender Moreno has been just as important to a mean Mexican back line which will look to keep the dynamic duo of Robben and Robin van Persie quiet.
Speculation back in Spain, where Moreno plays his club football, suggests that the Red Devils have already joined Atletico Madrid in chasing Moreno. The 26-year-old has been a mainstay of Espanyol's defence since his arrival from AZ Alkmaar - where has a favourite of van Gaal's during his time as manager. On Sunday, he will be hoping to dump his former boss out of the World Cup - but could end up reuniting with him in the process, with just a €10m (£8m) price tag believed to be on his head.
United fans should not only have their eyes on the Dutch players that van Gaal could bring to United, but also the outstanding Mexican defender.