About: http://webisa.webdatacommons.org/136406312

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Yes, I believe that Rosewall would have held the grand slam record had tennis been open throughout his career, especially given his longevity.
http://www.w3.org/ns/prov#wasQuotedFrom	tennis-x.com