No limits says Djokovic as he reaches 800 wins milestone

Tennis - ATP 500 - Fever-Tree Championships - The Queen's Club, London, Britain - June 22, 2018 Serbia's Novak Djokovic celebrates after winning his quarter final match against France's Adrian Mannarino Action Images via Reuters/Tony O'Brien

LONDON (Reuters) - Novak Djokovic chalked up his 800th career victory to reach the semi-finals of the Fever-Tree Queen's Club championships on Friday and suggested he could play on past his 40th birthday.

The 31-year-old Serb has been in the doldrums since winning the French Open in 2016 to complete his career Grand Slam, and has suffered with an elbow injury for 18 months.