Chelsea interim manager Rafael Benitez has responded angrily to comments about his management style from former Inter Milan defender Marco Materazzi.
Materazzi played under Benitez at Inter and is quoted as calling him "weak".
The 39-year-old also claimed Benitez took down pictures of former boss Jose Mourinho from the dressing room.
"Marco Materazzi is lying. Everything that he said is a lie," Benitez said ahead of Chelsea's Capital One Cup semi-final second leg with Swansea.
Former Italy international Materazzi, who was famously headbutted by Zinedine Zidane in the 2006 World Cup final, criticised the Spaniard's overuse of written rules.
Materazzi added: "At Inter's training centre, there were photos on the wall of all the most successful past coaches. Benitez had the ones of Jose Mourinho taken down. With that gesture, he showed his character; that of a weak person."
Benitez responded: "About the pictures, it's a lie. So he's a liar."
Chelsea go into Wednesday's second leg against Swansea needing to score at least three times at the Liberty Stadium after a 2-0 defeat in the first leg at Stamford Bridge.
But Benitez says he will not start with both Fernando Torres and Demba Ba in attack.
"It's not easy for us to play both at the same time given the quality of the players playing behind. It's an option for 15 minutes, and we can do it if necessary," he said.
"We have to score and win. For them, it depends: 2-0 up, they could wait and play counter-attack.
"They could try to pass the ball and attack, but I think they will wait for us.
"We have to go there and try to win. Not just 1-0 - we have to do a bit better than that. But we can do it. We have enough quality."