The 22-year-old is still in a coma after two nights in a Heidelberg clinic following the accident, which occurred while the player was on his way to training on Friday.
He remains in intensive care, his club confirmed today, and his condition "remains critical", but he is in "the best possible hands," according to Hoffenheim's general manager Andreas Muller.
"We have discussed how we should deal with the situation. We know that Boris is in the best possible hands and all we can do is hope that his condition stabilises itself further," he said.
Hoffenheim fulfilled their Bundesliga fixture against Augsburg yesterday, managing a 0-0 draw, and the players have now been given two days off before returning to training on Tuesday.
"The players should remain with their families and try to clear their minds as much as possible," said Muller.
"Of course they have the opportunity of coming into our training centre whenever they want."