Madrid, April 28 -- Novak Djokovic says he is facing up to a "new reality" after losing his opening match for the second successive tournament.

The Serb, seeking a fourth Madrid Open title, was beaten 6-3 6-4 by Italian Matteo Arnaldi.

Djokovic made his Madrid debut in 2006 and won the tournament in 2011, 2016 and 2019.

However, he said does not yet know if he will play again in Madrid following Saturday's loss to a player ranked 44 in the world, the BBC reported.

When asked if it was his final match there, he said: "I'm not sure if I will come back. So, I don't know.

"I mean, I'll come back, maybe not as a player. I hope it's not, but it could be."

Djokovic said his "level of tennis is not where I would like it to be", and added: "I...