Neymar has seen his place in the Clasico come under threat with a red card against Malaga - but could Cristiano Ronaldo also miss out on the clash?
While the Brazilian awaits to find out whether his dissent at the end of Barcelona's 2-0 defeat could cost him dearly, the Real Madrid star is also walking a tightrope.
With just one game to go before the game which could decide the fate of this season's Liga title, he sits uncomfortably on four yellow cards.
A booking against Sporting would earn Ronaldo an automatic one-match suspension, ruling him out of contention.
Dani Carvajal took extreme measures on Saturday to ensure his own participation.
The right-back picked up his fifth booking with a cynical foul during the 1-1 draw against Atletico, missing the game against the relegation strugglers in order to return against Barca.
But Ronaldo had no such intention of earning a caution, and thus must run the gauntlet - unless Zinedine Zidane decides to protect his star by keeping him off the pitch until the grudge match looms.
With Real Madrid three points clear of their rivals with a game in hand, resting his star goalscorer is a risk that the Frenchman could well be willing to take.