Ex-Barcelona captain Koeman slams Chelsea tactics: My teams would never play like that
Didier Drogba's goal, from Chelsea's one strike on target, gives the Blues something to defend in the Nou Camp on Tuesday.
"And, let's face it, this tie could have been all over by now. Barcelona could easily have won in London.
"Let's hope football will be the winner this week and the team with the best approach goes to the final.