Tournament of Champions - 1956 to 1959 - is it a Pro. Slam - yes or no?
Tournament of Champions is figuring on a number of Wikipedia pages as being one of the Pro. Slams (look at Lew Hoad's wikipedia page for instance where he won the 1959 event). It hasn't traditionally been regarded as one of the 'Pro Slams' - but is it?
Same question for Pro. Wimbledon of 1967.