2017 WTA Tour
The 2017 WTA Tour calendar comprises the Grand Slam tournaments ( supervised by the International Tennis Federation ( ITF ) , the WTA Premier tournaments ( Premier Mandatory , Premier 5 , and regular Premier ) , the WTA International tournaments , the Fed Cup ( organized by the ITF ) , the year-end championships ( the WTA Tour Championships and the WTA Elite Trophy ) . 
<triplet> Fed Cup <subj> International Tennis Federation <obj> organizer