Real Madrid superstar Cristiano Ronaldo was visibly upset when he was substituted against Levante on the weekend, and a LaLiga expert has now explained why he believes the Ballon d'Or holder was so angry to be taken off by Zinedine Zidane.

Click through the gallery above to see images of Ronaldo's unhappy reaction to being substituted on Saturday.

The Portuguese was replaced by Marco Asensio in the 82nd minute after his side had just scored to make the scoreline 2-1, but had to watch from the bench as his team conceded a late equaliser to drop another two points.

Zidane has since explained that he took Ronaldo off due to tactical reasons, and LaLiga expert Guillem Balague has now claimed that the 33-year-old was upset because the coach did not inform him of his plans.

"He was replaced by Zinedine Zidane when Real Madrid were 2-1 up away at Levante, and this was only the second time he was replaced this season," Balague wrote in a column for Sky Sports.

"The first time was Sevilla, having scored two goals himself and being 5-0 up.

"But at the weekend he was unhappy because Zidane had not told him he was going to be replaced – hence the reaction.

"He thinks Real are winning because of him, probably rightly so, and considers any no-planned substitution as an affront. He will be exactly the same at 40."

Read: Reports: What Angry Ronaldo Said After Zidane Subbed Him

The draw against Levante was the 10th LaLiga game in which Los Blancos have dropped points this season – a fact that has seen them drop to 19 points behind unbeaten league leaders FC Barcelona.

Do you think Zidane made a mistake in substituting Ronaldo against Levante? Have your say in the comments section below.