Roger Federer would be happy to end his career without adding to his 17 grand slam wins, but remains confident he can push for honours at majors.
Federer's last grand slam success came in 2012 at Wimbledon, with consecutive final appearances at the All England Club in the past two years giving Federer his best chances of another title - only for the legendary Swiss to run into Novak Djokovic, who also beat the 34-year-old in last year's US Open final.
Djokovic's astonishing form in 2015, which saw him win three of the four majors and reach finals in all bar one of the tournaments he entered, has led many to suggest the Serb could surpass Federer's record tally of grand slams.
Federer has no concerns about adding another grand slam to his bulging collection, however.
"I've come so close, I've played very well, but I don't feel any frustration because of it," Federer said after arriving for the Brisbane International, which will form part of his preparations for the Australian Open.
"I'm still happy with how I'm playing. It  was Novak's year, he played so well [and] there's only so much [you can do] if somebody's so dominant and he's got sky-high confidence.
"It's unfortunate, a pity for me, but at the same time I don't feel sorry for myself.
"I've won so much throughout my career, I feel like if I keep pushing forward it might happen. If not, it's OK.
"I've been playing really well for over one and a half years, ever since I came back from my back problems in 2013.
"That's been very encouraging and now I'm just more confident than I was maybe a year ago as well."