1999 ATP Tour World Championships
The 1999 ATP Tour World Championships ( also known for the doubles event as the "Phoenix ATP Tour World Doubles Championship" for sponsorship reasons ) was a tennis tournament played on indoor carpet courts . 
<triplet> 1999 ATP Tour World Championships <subj> 1999 <obj> point in time <subj> tennis <obj> sport <triplet> carpet court <subj> tennis <obj> sport