(Reuters) - Real Madrid's La Liga title challenge was left hanging by a thread after a late Humberto Osorio header earned Real Valladolid a 1-1 draw and Cristiano Ronaldo suffered an injury on Wednesday.
Real, hoping to keep the pressure on Atletico Madrid at the top of table, remained in third place, four points behind their city rivals and a point adrift of Barcelona with two games to play.
