Williams is in the USA squad for their games against Honduras and Ecuador.
"The coach at Hoffenheim is full of compliments and admiration for Danny, and I really want him to come in and get a first feeling for this group of players on the U.S. team. He's a player with a huge upside in the next couple of years. If it's possible to integrate those elements into a camp then we will continue to do that. Talking to his coach at Hoffenheim confirms he's ready for this step."