Tensions are said to be growing between Cristiano Ronaldo and Gareth Bale at Real Madrid as the two players compete to be the club's main man.
Reports in Spanish publication Diario Gol suggest that Ronaldo, who was substituted in the 79th minute in the 2-1 win over Athletic Bilbao on Saturday, was angry with manager Zinedine Zidane after the full-time whistle as he believed that Bale should have been brought off instead of him.
The Portuguese international had another disappointing game by his own standards at the weekend and with the match in the balance, he was replaced by Isco in the final 11 minutes of the game, as Los Blancos looked to preserve their slender lead.
Whilst Ronaldo was said to be annoyed with his manager, teammate Gareth Bale is also understood to be growing frustrated at Zidane's reluctance to use him in his preferred position on the right hand side.
With Ronaldo being utilised in a similar position, reports by Diario Gol suggest that the Welshman believes that the 2016 Ballon d'Or winner is being given preferential treatment by his manager and that the decision to play Bale out of his favoured position is, in the player's eyes, holding him back.
Madrid president, Florentino Perez, is thought to be monitoring the situation between the club's two biggest stars, however, having both signed new contracts towards the end of last year, it is unlikely that either man will back down as they fight to become top dog at the Bernabeu.
Whilst Ronaldo was unusually quiet against Bilbao on Sunday, Bale played a key role in assisting Karim Benzema's opener and a further goal from Casemiro handed Los Blancos all three points, meaning that they head into the international break with a two-point lead at the top of La Liga.