Carlo Ancelotti feels Florent Malouda has been 'amazing' for Chelsea after breaking out of his shell.
The Frenchman initially struggled to settle in England after completing a switch from Lyon in 2007.
His performances fell short of what was expected and he gradually slipped down the pecking order.
The flying winger has been able to rebuild his career at Stamford Bridge, though, and is now a mainstay in the side.
He has become a regular source of goals and ammunition down the flanks and Ancelotti believes the 30-year-old is currently at the peak of his powers.
"For the last year or so, Malouda has been amazing," the Italian said in L'Equipe Mag.
"Last summer, he was our best player. He has everything in his game. He can be quiet, intense, assist, defend and score.
"In modern football, his explosive quality is a crucial asset. He can always bring ideas to our play.
"This summer he came back with anger and desire. He wanted to surpass his achievements of last season following a bad World Cup. He has done that.
"He came to me in December 2009 to express his frustration at not playing in big matches. That showed strong character.
"I explained my position and he explained his own. To me there was never a problem because he is a great professional."
Didier Drogba has also piled praise on Malouda, insisting the fine form of his close friend is down to hard work and nothing to do with him.
"It is much easier to be outstanding on the pitch when the other players are playing well and are all working together towards a common goal," said the Ivorian striker.
"However, Florent never needed me to be a success at Chelsea. He has made a name for himself all on his own."