The Russia international could be joining United as Van der Sar's successor next season.
Akinfeev got the better of Van der Sar when Russia beat Holland 3-1 after extra time in the Euro 2008 quarter-final.
"Of course, I can't forget this!" said Akinfeev. "But Edwin was perhaps the least to blame. On the contrary, I remember three or four times when he really saved the Dutch.
"In general, Van der Sar is a world class goalkeeper who has established this over many years."