Sir Martin Sorrell says new US-China cold war is 'biggest issue' as S4 sales soar

d guru Sir [Martin Sorrell](//www.standard.co.uk/topic/martin-sorrell) has warned that deteriorating [US](//www.standard.co.uk/topic/us) - [China](//www.standard.co.uk/topic/china) relations are causing significant issues for multinational businesses like his. The [S4 Capital](//www.standard.co.uk/topic/s4-capital) boss told the Standard that the brewing [cold war](//www.standard.co.uk/topic/cold-war) between the West and China was the "biggest commercial issue" facing [business](//www.standard.co.uk/topic/business) . "We are looking at China, we want to expand," he said. "We have to do it carefully." S4 Capital has offices in Shanghai and Sorrell said China was an "extremely important" market. But the company is being forced to think carefully about how it operates there, given the deteriorating geopolitical situation. "You can't…