Liverpool boss Rafa Benitez can't split Champions League finalists Manchester United and Chelsea.
"I think the final will be 50-50 because both teams are very good," said Benitez.
"It has been great to see three English clubs in the semi-finals, it shows how high the standard is in the Premier League.
"And I feel that next season it is possible to see four English clubs in the semi-finals.
"The merit of the top four is outstanding. We have beaten the top sides in Spain and Italy between us, and I can see us getting stronger."