BASEL, Switzerland (AP) -Novak Djokovic has called for ``crucial'' meetings to address the heavy playing schedule faced by top tennis players.

The third-ranked Serb said Friday that more players were getting injured because of the demands of a long season.

Djokovic said players should have up to two months rest before preparing for the Australian Open in January.

He spoke at the Swiss Indoors tournament. U.S. Open champion Juan Martin Del Potro pulled out of the tournament because of a wrist injury.

Leading players and ATP tour officials will gather at the Paris Masters next week. The season-ending finals in London starts on Nov. 22.