Chelsea News: Maurizio Sarri identifies a major problem after the collapse of Slavia Prague in the second half

Maurizio Sarri had difficulty understanding Chelsea's performance against Slavia Prague in the second half, but admitted to being happy that his team had progressed in the Europa League.

Chelsea took a 3-0 lead in the first 17 minutes of their quarter-final match against the Czechs thanks to goals from Pedro, Olivier Giroud and a goal by Simon Deli.

At half-time, they were 4-1 in the night after Pedro added his score following Tomas Soucek's strike for the visitors, giving them a total cushion of four goals.

However, the visitors rallied in the second half and a double from Petr Sevcik within ten minutes of the restart gave Slavia Prague the hope of creating a remarkable surprise.

In the end, Chelsea was able to keep his opponents at bay for the remainder of the match, but Sarri was not impressed by the performance slump of his players.

Asked about Chelsea's performance, he said: "Very good in the first period, I think. As usual, we started badly in the second half. We need a solution. In the last ten games, we started like this game. It's a big problem.

"We had to qualify and maybe we thought we had at the end of the first half. I have never seen anything like this, like these opponents.

"It was clear that the second half would be difficult, we did something wrong, they scored with a kick without anyone nearby, we are happy to pbad.

At half-time, I said that the target was the beginning with the same application. I do not know why. This is not easy to understand. Otherwise, we will not be able to resolve the situation. I can try not to go into the locker room at half-time. "

Chelsea's reward for defeating Slavia Prague 5-3 in aggregate was a semi-final encounter against Eintracht Frankfurt, who scored a goal on the pitch after a 4-4 draw with Benfica.