Andy Murray continued his recovery from back surgery with a practice session in Miami on Tuesday.
The Wimbledon champion published a photograph on his official Facebook page with a caption that read: "Sun is shining, back on the courts."
The 26-year-old has not played since helping Great Britain's Davis Cup team defeat Croatia to book their spot in the World Group two months ago.
He has yet to decide whether to compete in January's Australian Open.
The Scot has finished as runner-up three times in Melbourne, losing the 2013 final in four sets to Serb, and current world number two, Novak Djokovic.
Murray's lingering back problem forced him to withdraw from the French Open in May, but he recovered to become the first Briton to win the Wimbledon men's singles title since Fred Perry in 1936.
In September, his defence of his US Open title ended in the quarter-finals, but he went on to enjoy success with his GB Davis Cup team-mates, who secured their place in the 2014 World Group.
Murray then underwent surgery and missed the recent ATP World Tour Finals in London as he recovered.