
Novak Djokovic led the tributes to victims of the Paris terror attacks on Sunday at the ATP World Tour Finals event in London.

The O2 arena in London is illuminated with the red, white and blue of the French flag as a mark of respect to the victims of Friday's terror attacks in Paris. The venue is currently hosting the ATP World Tour Finals tennis tournament.

Novak Djokovic (r) and Kei Nishikori observe a minute's silence to remember those who lost their lives in Friday's terror attacks in Paris prior to their men's singles match at the ATP World Tour Finals Sunday.

Djokovic started the strongest, losing only one game in the first set.

Nishikori throws the ball to serve during Sunday's match with Djokovic.

But there was little the Japenese player could do to breach the defense of Djokovic.

Djokovic ran out 6-1 6-1 victor with the result result ensuring he would end the year as World No 1. He received a trophy to mark the achievement on court after the match.