*SPORTS RIGHTS TOO VALUABLE FOR BROADCASTERS TO LOSE: SORRELL
*BIG 6 WEB CO.S TO SCRAMBLE OVER PL SOCCER RIGHTS STRUCTURE: WPP
*SPORTS RIGHTS STILL CRITICAL PROPERTY FOR BROADCASTERS: SORRELL
*WPP'S SORRELL SEES RISE IN OTT SPORTS OFFERINGS, CITES DISNEY
*WPP: SPORTS ENT. INVESTORS MUST FOCUS ON RETURNS AS COSTS RISE
*WPP SEES TREMENDOUS PRESSURE ON PACKAGED GOODS PLAYERS ON COSTS
*SORRELL: MEDIA COS CAN USE ACCESS, INFLUENCE, ADVISE ON RIGHTS
*SORRELL: MEDIA COS HAVE WAYS TO COMPETE ON SPORTS RIGHTS
*SORRELL: APPLE, MICROSOFT, FB WILL BE BIG SPORTS-RIGHTS FACTORS
*WPP'S SORRELL SEES AMAZON AS FACTOR IN PREMIER LEAGUE AUCTION
*SORRELL SAYS TEAM OWNERS FACE CHALLENGE ON PACKAGING TV RIGHTS