Jonas cancelled out Gonzalo Higuain's early strike.
Real coach Jose Mourinho remarked afterwards: "When you don't win you always hope for more. It's normal. It's a game similar to last year. You always want to win.
"There's no game where you draw and you're satisfied. To lose this game was difficult, because the opposition hasn't created chances to score. But you always draw games throughout the season. We drew last season. Last year it was Guaita who was the best player on the pitch and this year it has been Diego. I don't think we played a great game but we did enough to win."