Novak Djokovic has added his voice to those calling for a reform of the Davis Cup format, with the world number one favouring a more concentrated competition for the worldwide team event. In addition, the men's top seed at the ATP and WTA Miami Masters would also like to see the Australian Open played a bit later in the season but is fully on board with the addition of an extra week of grass preparation between the end of Roland Garros and the beginning of Wimbledon. For starters, the eight-time grand Slam winner said that he supports a pending proposal to add a tiebreaker to the fifth set of any Davis Cup rubber, which would end marathons such as the nearly seven-hour struggle at a March first-round tie in Argentina.