Atlanta rookie guard Chennedy Carter left Monday's 93-82 loss to Connecticut with a left ankle injury in the first quarter and did not return.
Carter underwent X-rays and an MRI after the game. The Dream said late Monday night that she was still at the hospital being evaluated and that they would have an update Tuesday morning.
Carter, 21, played just over three minutes Monday before the injury.
"I don't know if we'll get her back or how quickly," Dream coach Nicki Collen said. "I don't have any idea at this point."
Carter, the No. 4 draft pick in 2020, came into the game averaging a team-high 19.4 PPG and is one of the top candidates for WNBA rookie of the year. She became the youngest player in WNBA history to hit the 30-point mark on Aug. 6, scoring 35 points against Seattle.
The Dream got an addition Monday in center Kalani Brown, who made her season debut after recovering from COVID-19. The second-year player out of Baylor had 13 points and four rebounds. But the Dream lost their fifth game in a row, turning the ball over 19 times.
"We're going to turn it over more if Chennedy's not on the floor," Collen said. "She puts pressure on the defense. We had trouble at times initiating offense and getting open."