Should London be an event listed from 1972 to 1975? Should it not be Canada instead Montreal/Toronto (varied according to year) 

In the Wikipedia site for Wembley it says that the tournament wasn't played between 1972 to 1975. So the tournament winners for London that you have for those years Winners Năstase 1972, Okker 1973, Connors 1974, Dibbs 1975 - were at some other London tournament. Did it have the prestige of Wembley in those years? If you look at another very similar site:

http://en.wikipedia.org/wiki/Grand_P...ries_1970-1989

They have Canada listed in those years rather than London.

What are you thoughts?