Juan Martin del Potro withdraws from Australian Open due to knee problems
Three-time champion Andy Murray and Japanese tennis star Kei Nishikori have already withdrawn from the Australian Open.
Three-time champion Andy Murray and Japanese tennis star Kei Nishikori have already withdrawn from the Australian Open.
Talking about the 2019 Rogers Cup, it will be held in Montreal from 3-11 August.
Del Potro, a fan favourite who won a silver medal at the 2016 Summer Olympics in Rio de Janeiro and a bronze medal at the 2012 London Games, is undergoing rehab in his hometown of Tandil.
Stefanos Tsitsipas advanced after Federer -- returning to clay after a two-year absence -- retired with a right leg injury before their game.
Kei Nishikori will compete in the ATP Finals in London following the withdrawal of Juan Martin del Potro due to a right knee injury.
The Argentine player will continue to rest, as his doctors have instructed on Sunday.
Top seed and holder Federer starts his campaign on Wednesday against Russia's Daniil Medvedev.
The 31-year-old Serb is underlined his reputation as the finest hardcourt player of his generation with dominant showing.
Djokovic has won 14 of their 18 career meetings, including in the quarter-finals of the 2012 US Open.
An elbow injury in 2003 prevented his expected French Open debut that year and a stress fracture in one ankle kept him out of Roland Garros and Wimbledon in 2004.
