Nuri Sahin has hit out at Liverpool manager Brendan Rodgers after his disappointing six-month loan spell at Anfield earlier this season.
Sahin, 24, is currently at Borussia Dortmund after his switch from Real Madrid to Liverpool failed to work out.
The Turkey international midfielder made 12 appearances for the Merseysiders but only completed the 90 minutes four times, with three of those occasions coming in the Europa League.
He told AS that Rodgers had played him out of position as a No. 10 when his best role was deeper in midfield, and insisted: "I did not fail at Liverpool.
"Brendan Rodgers wanted me to play as a ten. But I do not play behind the forwards. I spoke with him and asked him why I was playing there. It is not my real position.
"The boss could not answer me... still, I am not sorry about it. To play in the red jersey and be in Anfield is something marvellous. Maybe if I had not gone there I would not have been able to return to Borussia Dortmund.
"For that, I am happy. But I have left Brendan Rodgers, thanks be to God."
Sahin, still a Madrid player but loaned to Dortmund until summer 2014, said he had a better relationship with Blancos boss Mourinho and had been impressed by the Bernabeu side's recent form.
"We speak often on the telephone," he said. "We chat about football and life. The boss feels good, and I believe the [Champions League] game against Manchester United is very important for Madrid. Now they are in a perfect position.
"People talk more about [referee] Cuneyt Cakir's decision [to send off United's Nani] than Madrid's performance, but Madrid played a very good game.
"They are going very well. It is not easy to beat Barcelona twice. The truth is Madrid are one of the big favourites for the Champions League."
Sahin featured even less during his season under Mourinho than he had under Rodgers, but said an injury suffered immediately after joining Madrid had been to blame for his inability to settle in Spain.
"I was injured in the first training session," he explained. "If I had not had that problem, I am sure it would have been very different for me.
"But these things happen in football. I do not want to go over the past."
Although still being mostly used as a substitute since his return to the Westfalenstadion in January, Sahin said he felt much better at Dortmund and said they were capable of a challenge for this season's Champions League.
"I feel well physically and mentally, everything is perfect," he said. "After returning to Germany, I feel much better.
"Here, my objective is to stay in second place because the Bundesliga title is difficult. But, with a little bit of luck, we want to go for the Champions League."