Xhaka did not receive a yellow card for fouling Neymar

Switzerland is playing against Brazil in their world cup opener. Every Swis player is focused on Brazil superstar Neymar and they make a lot of fouls on him. And when Arsenal player Granit Xhaka fouled him, he didn't recieve a yellow card. https://twitter.com/Ahmed91Gooner/status/1008417775113601024 What do you think, was it a yellow?