Van der Sar played for Van Gaal with Ajax and Holland.
"Itâ€™s always exciting when a new manager comes in," he said. "This season was obviously a major disappointment but Iâ€™m sure van Gaal will turn things around with the help of Ryan and the other coaches he brings in.
"Heâ€™ll have a look at the youth academy as well and Iâ€™m sure there will be a couple of signings, too. So yes, itâ€™s exciting."
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