Roger Federer can reproduce his best form and start challenging for grand slam titles again, according to his former coach Paul Annacone.
Federer has won 17 grand slam titles in his career but his last triumph came in 2012 at Wimbledon and since then he has struggled to reach the same heights.
The Swiss star is due to make his comeback from a knee injury on Monday when he will compete in the Hopman Cup in Australia with Dan Evans providing the opposition.
Novak Djokovic and Andy Murray have dominated tennis in the last couple of years but Annacone is convinced that Federer can still compete at the top if he remains injury-free.
“Last year was a very tough year for him and he still got to the semis of Wimbledon,” Annacone, who coached Federer for three years, told the BBC.
“There is no reason why he can’t play at that level again.
“When you look at his track record, particularly on grass, if he’s healthy, it’s going to be very difficult not to put him in the sentence as one of the favourites.
“Again, it’s about staying healthy, but I absolutely think he can contend for a major title.”