Novak Djokovic has confirmed that he has made some changes to his racquet and says while he is still getting used to the adjustments, they could help his game.
The Serb said the switch had been during this season.
"I mean, the model is the same," he told press at Monte Carlo. "I made some small minor changes that actually in our world are quite significant.
"Also [Andre] Agassi and Radek [Stepanek] who worked with me at the time felt it was a good call for big picture and for a long run."
Djokovic has also said that he and his coach Marian Vajda, with whom he recently reunited, have agreed to work together during the rest of the clay-court season.
There have been suggestions that the racquet is lighter, to reduce the pressure on his recently injured elbow.
Match point from Djokovic's win over Coric in Monte Carlo: