Barcelona coach Ronald Koeman said his side's 2-0 defeat to Sevilla in Wednesday's Copa del Rey semi-final first leg was an unfair scoreline given their performance but backed them to turn the tie around.
Defender Jules Kounde put Sevilla in front in the first half after a stunning individual run while Ivan Rakitic added the second late on, after Barca had been denied a penalty and Lionel Messi had been thwarted three times by keeper Bono.