Barcelona coach Pep Guardiola was admitted to hospital overnight for treatment on his back problem.
Guardiola has been suffering from acute lower back pain for the last few weeks but the problem has worsened in recent days and he was unable to attend team training on Tuesday.
Guardiola, 40, sat on the Barca bench for last night`s 1-0 league victory at Valencia, but the post-match press conference was taken by his assistant Tito Vilanova. Guardiola will again be missing for Thursday's training session.
Barca, who provisionally moved 10 points clear of second-placed Real Madrid in the La Liga table with their win at the Mestalla, play Real Zaragoza this weekend at the Nou Camp before next week hosting Arsenal in the second leg of their Champions League last-16 tie, where they will look to overturn a 2-1 deficit from
the first leg.
