He did book him for the foul but gave them the free kick for a supposed push on the lad by Diarra. Another ludicrous decision, it's why he never got sent off. RidiculousFrom BBC -
"But Bournemouth themselves were perhaps fortunate not to see red when the VAR decided to stick with Jared Gillet's on-field decision to show Tyler Adams a yellow card only for his studs-up challenge on Granit Xhaka"
Sorry , but he didn't show Admas a yellow card did he ? He gave the free kick to Bournemouth, or am I tripping me nut off ?