United's all-time record appearance-maker was the latest guest on the MUTV Group Chat, and was soon asked about his former team-mate's praise for van Gaal.
Rooney had written in his Sunday Times column that "tactically, van Gaal was by far the best" but that, overall, "Fergie was streets ahead", and Giggs admitted he completely understood the legendary striker's judgment.
"I understand what Wayne was saying," explained Giggs. “Obviously we both worked under Sir Alex who I’ve known since I was 13. Sir Alex had everything – man-management, discipline, standards, tactics, knowing a player… but with him, because we had such good players who had been together for a long time, you’d just go out and play. You knew your role, it was just a matter of just tweaking it.
“With Louis it was probably the opposite. We played different systems under him whereas under Sir Alex we more or less just played one system and we’d tweak it. I can’t remember us ever playing three at the back, maybe once or twice if we needed to hold on, but other than that we didn’t.”