Luis Melendo Olmedo wants the tie replayed.
Enrique announced he will leave Barcelona at the end of the season.
The Catalan club has a need at full-back.
The Spanish side lost 4-0 to Paris Saint Germain last week.
Messi scored in a 4-1 win over Espanyol Sunday.
Liverpool is third in the Premier League.
Guardiola won 14 trophies in four years at the Camp Nou.
Enrique's side faces Real Madrid on Saturday.
Barcelona faces Manchester City on Tuesday.
No live football can be broadcast in the U.K. on Saturday afternoons.
Messi tore a muscle in his groin against Atletico Madrid.
A new video sheds light on the lethal duo's relationship.
Hector Bellerin is admired by his old club.
Barcelona leads La Liga on goal difference, with Atletico Madrid and Real Madrid close behind.
A third consecutive defeat has allowed rival teams to close in on Barcelona.
Ivan Rakitic apologizes to fans after third consecutive league defeat.