The former Manchester United goalkeeper broke into the Ajax first team setup under Van Gaal.
Manchester United have had a love affair with the big names from Dutch football over the last few years. And none are much bigger, literally, than the Netherlands' record cap holder Edwin van der Sar.
On Friday night the Dutch icon got on Twitter to pay homage to the man that got his professional career rolling, current United boss Louis van Gaal.
The Dutch legend didn't join United until he was 34-years-old, but such was his quality that he went on to prove himself one of the division's top goalkeeper all the way up until 2011 when he retired at the age of 41.
Van der Sar is way out in front when it comes to appearing for Oranje, having 130 caps compared to nearest rival Frank de Boer who has 112.
Both players were part of an astonishing crop of youngsters to emerge for Ajax under Louis van Gaal in the 1990s, where United's current boss cut his teeth in his first managerial job by winning three Eredivises in a row while also winning the Champions League in 1995.
Van der Sar and De Boer are just two of a whole clutch of players Van Gaal had at Ajax that went on to enjoy phenomenal careers, and it is little surprise that the former goalkeeper, now marketing director at his old club, has such fond memories of both Van Gaal and Ajax in general.
More than anyone else, he has every right to wish his old boss well at the final club of his playing career.