Kleberson admits regrets over his time at Manchester United.
The Brazilian joined Manchester
United at the same time as the flash 18-year-old
Cristiano Ronaldo in August
2003.
Kleberson, 30, now with Flamengo back in Brazil, signed for
United for £5.93m. He was sold to Besiktas for £2.5m two years
later after just 24 starts and two goals. Fatally, he never got on
with Alex Ferguson.
He admitted: "I arrived in Manchester, along with Ronaldo, with
a lot of hope but left with huge sadness. An injury in only my
second league match proved a very negative factor and in my second
season I wasn't given many chances.
"My Brazilian coach Dunga had more faith in me than Ferguson. I
believe I could have been a bigger success in English football. But
not everyone is guaranteed success at United."