Real Madrid goalkeeper Iker Casillas has taken a new swipe at Chelsea manager Jose Mourinho by claiming Carlo Ancelotti, his successor at the Santiago Bernabeu, "has put a smile back on the faces of the supporters".

The Spanish star had a tense relationship with the current Chelsea boss during his three-season tenure in La Liga after the boss relegated the club legend to the bench ahead of Diego Lopez.

The keeper has now reignited the feud with his former boss by claiming Ancelotti has returned Real Madrid to the right path after replacing the Portuguese manager.

Although Mourinho won the Copa del Rey in 2011 and La Liga in 2012, he failed to win a highly desired 10th Champions League trophy and presided over a final season in charge without any silverware.

Meanwhile, the Italian manager won both the European Trophy and the Copa del Rey last season and will face Juventus on Tuesday night (May 5) in the Champions League first-leg semi-final.

Speaking ahead of the game against the Seria A giants, Casillas said: "Ancelotti is the coach that has put a smile back on the faces of the supporters.

"He brought us the highly desired 10th European Cup and given the club a magical 2014 winning four titles.

"I'd agree that Ancelotti and [Spanish boss Vicente] Del Bosque share similarities. They are both winners and they both have similar styles in overseeing the team. They care about the welfare of the squad and are not authoritarian."

Meanwhile, Casillas expressed his hopes to secure a positive result at Juventus.

"This is a Clásico -- a very attractive match. Two teams full of great players and different ways of playing the game. It will be tricky for us but we hope to leave Turin a positive result," said Casillas.