Cape Town - Roger Federer may have fallen outside the world's top 10 for the first time since 2002, but former coach Stefan Edberg feels he is still capable of winning against the best.
The 17-time grand slam winner has been out of action since July after taking a break from tennis to fully recover from knee surgery and a niggling back injury.
Since the 35-year-old Federer's layoff, there have been big changes at the top of the men's ATP rankings with Andy Murray's rise to world No 1 replacing Serbia's Novak Djokovic for the top spot while Federer has slid to 16th.
Federer plans on returning for the Australian Open in January 2017, but many feel his age is against him from challenging for silverware having won his last grand slam title at Wimbledon in 2012.
But former coach and six-time major champion Edberg told Tennis World that he feels that winning another slam is not out of the question for the Swiss legend.
"I thought in the past years he would have won one, he was so close," said Edberg.
"It becomes even tougher, he is not young anymore but there is still hope.
"If there's one who can do it, it's Roger, but it will be an emotional challenge for him to come back next year."