This article lists various career, tournament, and seasonal achievements by Serbian tennis player Novak Djokovic. Djokovic is a twenty-one time Grand Slam champion and a record seven-time year-end world No.1. He has been world No. 1 for a record 373 weeks. Djokovic is one of eight one male players to achieve the Career Grand Slam and one of four to achieve the Double Career Grand Slam. He is the only player in tennis history to hold all four major titles on three different surfaces at once. He is also the only player to win all four majors, all nine ATP Masters 1000 tournaments, and the ATP Tour Finals in their career, with him winning each at least twice.