1974 U.S. Professional Indoor
The 1974 U . S . Professional Indoor was a men's tennis tournament that was part of the WCT circuit and played on indoor carpet courts at the Wachovia Spectrum in Philadelphia , Pennsylvania in the United States . 
<triplet> 1974 U.S. Professional Indoor <subj> tennis <obj> sport <triplet> WCT circuit <subj> tennis <obj> sport <triplet> carpet court <subj> tennis <obj> sport <triplet> Wachovia Spectrum <subj> Philadelphia <obj> located in the administrative territorial entity