There have been suggestions in the Spanish media that Real captain Casillas had divulged team secrets because he was involved in a power struggle with Mourinho.
But Casillas wrote on Facebook: "Over the past few months, without wanting it, I've been linked to a number of affairs.
"One day they were saying I didn't encourage my teammate Cristiano Ronaldo (it's harder to find someone who admires him more than me)..., another time I'm a mole and I leak information.
"After 13 years spent in the greatest club in the world it's quite simply unwarranted.
"It was said 'Mou' and me couldn't stand each other (if there is someone I respect more than anyone it's my manager who has succeeded in getting Real Madrid back on the path to success)."
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.