Real Madrid forward Vinicius Junior has suffered a hamstring injury, said the Spanish club Monday, ruling him out of the upcoming Champions League match with Liverpool.

"After tests taken today our player Vinicius Junior has been diagnosed by Real Madrid's medical services with a hamstring injury in his left leg," said Los Blancos in a statement.

Spanish media reported the Brazilian winger is expected to miss almost a month, which would also keep him out of the Champions League visit to Atalanta on December 10, as well as Wednesday's match at Anfield.