The year's first tennis Grand Slam, the Australian Open, starts on Monday with Serena Williams going for a record-equalling 24th Major title and Novak Djokovic seeking his eighth victory at Melbourne Park. Concerns over Australia's raging bushfires have dominated the build-up, with practice suspended on Tuesday as heavy smoke blew over Melbourne. We will move the following: Tennis-AUS-Open-environment-climate-bushfires,lead MELBOURNE Toxic air pollution from unprecedented bushfires forces a halt to practice sessions ahead of the Australian Open, but qualifying matches go ahead with organisers closely watching players' health. 600 words 0330 GMT. Picture We will also move: Tennis-AUS-Open-fire,Q&A Tennis-AUS-Open-men,PREVIEW MELBOURNE Novak Djokovic admits the next generation of players are edging closer, but tennis's Big Three remain one step ahead as they aim to extend their dominance at the Australian Open. 600 words 0330 GMT. File picture We will also move: Tennis-AUS-Open-men,POINTS afp