Barcelona midfielder Arthur has returned from injury and will be included in the squad which will face Real Madrid in the second leg of the Copa del Rey semi final on Wednesday.
The 22-year-old has been out of action since the start of the month after picking up a hamstring injury, and manager Ernesto Valverde previously claimed that he'd hoped Arthur would become available for the weekend.
But the Brazil international has actually returned ahead of schedule and has travelled with his teammates to Madrid, alongside second-choice goalkeeper Jasper Cillessen who was also a doubt for the match.
The first leg of their Copa del Rey clash finished 1-1 after Brazilian winger Malcom cancelled out Lucas Vázquez's early opening goal.
One of Spain's two biggest clubs will take on either Real Betis or Valencia in the final at the end of the season, who came away from the first leg 2-2 with the second leg to be played at Valencia's Mestalla.
Neither Real Madrid or Barcelona will have a moment's rest after Wednesday's El Clásico as they meet once again in La Liga on Saturday.
Barcelona, who will play once again at the Santiago Bernabéu, can move 12 points clear of Real Madrid in their hopes of retaining the league title.
Meanwhile, Los Blancos will temporarily move ahead of city rivals Atlético Madrid if they can snatch the win, as Diego Simeone's side don't take on Real Sociedad until Sunday.