Barcelona coach Ernesto Valverde says they can't underestimate Copa del Rey opponents Murcia.
Valverde's side are currently top of LaLiga after an impressive start but despite their strong performances this season, he is not allowing his players to take the foot off the gas in midweek.
"It is one of the most complicated games we have faced this year," he said at his pre-match press conference.
"We will need to be fully switched on to beat them and they will be treating it as their game of the year."
Source: tribalfootball.com