Fiorentina coach Cesare Prandelli has defended his tactics.

Prandelli has brought a new defensive system to the Viola as they battle to get away from the dropzone.

“Reviewing the training sessions and the match we played with four defenders, there were some uncertainties," he said.

“I wanted to remove all alibis from the team, and I wanted to empower them. I'm always convinced that the defensive phase must be done the best way.

“I'm not ashamed of defending a difficult result or game. Often, looking for the good football, many teams have found themselves struggling for salvation.

“We need concentration and I want to see the energy from the other night tomorrow."