About: http://webisa.webdatacommons.org/28335468

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	At best, only a third of the year is played on clay, so a fair comparison would be if two-thirds of their matches had been played on surfaces other than clay.
http://www.w3.org/ns/prov#wasQuotedFrom	tennis-x.com