Barcelona coach Luis Enrique says that Arda Turan, Sergio Busquets and Andres Iniesta have been struck down with flu and are doubts for Wednesday's Copa del Rey quarterfinal second leg at home to Athletic Bilbao.

Barca go into the game 2-1 ahead after last week's first leg at San Mames, and also with one eye on Saturday's looming top of the table clash with Atletico Madrid at the Camp Nou.

Neymar was rested for last weekend's 2-1 La Liga win at Malaga and the Brazilian looks set to return for a third meeting with Athletic in 10 days, but Luis Enrique insists he will wait until the morning of the game to decide if his ill trio can play.

"Arda, Iniesta and Busquets have the flu," he told his prematch news conference. "We will see how they feel tomorrow."