The former world number one tennis player Roger Federer has announced Stefan Edberg will become part of his coaching team at the Australian Open and for the 10 weeks after the season's first Grand Slam.
Edberg, a former world number one and a six-time major winner, had been hitting with Federer over the winter as the Swiss gears up for what could be a make-or-break season.
Federer is a 17-time major winner but is now ranked number six in the world.
