Mathieu, 33, who spent 3 seasons on the Nou Camp, left for Sporting Lisbon on a unfastened switch in the summertime.
The defender faces his former membership within the Champions League on the Estadio Jose Alvalade on Wednesday and was requested whether or not he would have a good time a function in opposition to them.
“I have a lot of admire for my former teammates and the enthusiasts,” Mathieu instructed Marca.
“If I have a good time, it’ll be on account of Bartomeu and Robert Fernandez [Barca’s sporting director], for the reason that manner they handled me made issues in reality tough.
“It was just those two. But that’s football, and I’m happy now. I’m not bothered any more.”
In a separate interview with Esport3, he claimed Fernandez had made the verdict to transport him on with out the data of trainer Ernesto Valverde.
“Robert told me he wasn’t counting on me,” he mentioned.
“I wanted to talk with Valverde. I called him, but he thought that I wanted to leave.”
Mathieu, who scored a unfastened kick in Sporting’s win over Tondela, added: “I performed a lot at Barca, I received titles, and the one factor that hurts is that folks say I did not play a lot.
“In the primary season I performed 58 in step with cent of suits and I scored essential targets.
“In the second one season a little much less, round 54 in step with cent, which was additionally tremendous.
“But within the ultimate yr issues have been tough, with accidents and a insecurity from the chief.
“The downside was that Luis Enrique did not communicate with the avid gamers a lot and I did not know what to do to play extra.”
Mathieu’s ultimate recreation for Barcelona got here in opposition to Juventus in ultimate season’s Champions League defeat in Turin, when he was substituted at part-time.
He feels he was made a scapegoat, claiming that newspaper Diario Sport “all the time had one thing dangerous to mention about me.”
“Football is a crew recreation, and whilst you lose, it is by no means one individual’s fault,” he persisted.
“I’ve watched the sport in opposition to Juventus once more and everybody says that I was the issue.
“It’s true that in one of the goals I’m one-on-one and I’m backtracking, but after that there’s a pass and you could ask what [Javier] Mascherano or [Gerard] Pique are doing, but no. That’s my opinion.”