Atletico Madrid striker Mateja Kezman says he is pleased to have left Chelsea because he found coach Jose Mourinho very difficult to work with.
The Serbia & Montenegro international also believes former Blues team-mate Frank Lampard would benefit from a move to La Liga.
Kezman was unable to hold down a regular place at Stamford Bridge but felt he did learn things during his time in West London.
"He [Mourinho] is a good coach," the former PSV Eindhoven attacker told Sky Sports News.
"I learned a lot of things in a tactical way from him but I don't like him as a person.
"For me, he's a very difficult person to work with. Sometimes, it was very difficult to talk with him.
"So I found it very, very difficult and, finally, I am proud I was playing for him and Chelsea but also very happy that I left."
Kezman is a big admirer of Lampard and also Chelsea's Russian owner Roman Abramovich.
"Lampard has a lot of potential," he continued. "He's a very strong character and, for me, one of the best midfielders in the world.
"Of course, if he comes to Spain, I think he can show more football because, in Spain, people like to play. In England, it's just fighting.
"So it might be good for him to move to clubs like Barcelona or Real Madrid.
"Abramovich is a guy who loves football. He gives a lot of money there and really enjoyed it.
"I was with him one year. Sometimes, he was like a small kid. You can see how much he loved football.
"He enjoyed every single minute and spent a lot of time on the training ground. He talked with the players.
"He's a good person and I think football needs people like him."
The Serbia & Montenegro international also believes former Blues team-mate Frank Lampard would benefit from a move to La Liga.
Kezman was unable to hold down a regular place at Stamford Bridge but felt he did learn things during his time in West London.
"He [Mourinho] is a good coach," the former PSV Eindhoven attacker told Sky Sports News.
"I learned a lot of things in a tactical way from him but I don't like him as a person.
"For me, he's a very difficult person to work with. Sometimes, it was very difficult to talk with him.
"So I found it very, very difficult and, finally, I am proud I was playing for him and Chelsea but also very happy that I left."
Kezman is a big admirer of Lampard and also Chelsea's Russian owner Roman Abramovich.
"Lampard has a lot of potential," he continued. "He's a very strong character and, for me, one of the best midfielders in the world.
"Of course, if he comes to Spain, I think he can show more football because, in Spain, people like to play. In England, it's just fighting.
"So it might be good for him to move to clubs like Barcelona or Real Madrid.
"Abramovich is a guy who loves football. He gives a lot of money there and really enjoyed it.
"I was with him one year. Sometimes, he was like a small kid. You can see how much he loved football.
"He enjoyed every single minute and spent a lot of time on the training ground. He talked with the players.
"He's a good person and I think football needs people like him."
