Valladolid coach Miroslav Djukic is not taking anything for granted ahead of the home game with Zaragoza, despite a good first half to the season.
The Serbian's team sit in a comfortable tenth position with 25 points but Djukic is especially wary of Sunday`s opponents.
``Zaragoza are dangerous and away from home have won a lot of points. They are a fast side, solid in defence and counter-attacks well.
``We are deciding still who should play, I may rotate my side, there are players who are working well but not getting a chance``, he told local paper El Norte de Castillo.
Valladolid had a convincing 3-1 home win over Mallorca last Saturday, the first in five, but changes are expected.
Javier Baraja will come into midfield to cover the suspended Llums Sastre, while Djukic has been experimenting with a side that includes Carlos Gonzalez instead of Mikel Balenziaga at left-back and Javi Guerra in place of Daniel Larsson in the lone forward role.
Zaragoza's Portuguese forward Hector Postiga has underlined the importance of the game, telling the club's website: ``Winning games is the best vitamin a footballer can take, if we continue to win we won't feel tired, personally I feel good and want to score goals.''
Zaragoza sit three points behind their opponents in 13th place and will be without right-back Cristian Sapunaru who is suspended.
New signing Jose Manuel Fernandez from Cordoba who coach Manolo Jimenez has described as ``aggressive, fast with a good right foot'', should make his debut in place of the Romanian.