Martin Sorrell takes back Google and Amazon 'frenemies' comment at Advertising Week New York

S4 Capital Executive Chairman Martin Sorrell admitted on Wednesday that he no longer sees big tech companies as posing a competitive threat to advertising business—declaring the need to partner with Amazon and Google, not fight them.Sorrell was appearing on an Advertising Week New York panel exploring the evolution of TV, along with recently appointed General Motors Global Chief Marketing Officer Deborah Wahl. Sorrell acknowledged his infamous quote calling the tec