Aston Villa's Lucas Digne and Matty Cash were struck by a bottle thrown from the crowd in their side's Premier League game at Everton on Saturday.
The plastic bottle was thrown as Villa celebrated Emi Buendia's goal just before half-time.
It appeared to land between the two players, who both stayed on the floor briefly before being able to continue.
Full-back Digne joined Villa from Everton two weeks ago after asking to leave.
"What has happened and some things that was said about me in the last month has made me very sad," Digne wrote in a post on Instagram at the time.