Dave Mackay, one of my favourite players.RIP
I think I must have seen him twice, although I doubt I'd heard of him at the time.
The second time was at Tottenham 16 Oct 1965, when the players comprised 14 Englishmen, 5 Scots and 3 Irishmen.
https://www.11v11.com/matches/tottenham-hotspur-v-manchester-united-16-october-1965-78531/