Spain's Rafael Nadal is presented with the ATP World Tour No 1 Trophy Action in London, Britain, Nov 12, 2017. [Photo/Agencies]

LONDON -?Rafael Nadal was presented with the ATP World No 1 award on court at the ATP World Tour Finals at the O2 Arena here on Sunday.

The 31-year-old Spaniard, who replaced Andy Murray of Britain at No 1 on August 21, has guaranteed the year-end No 1 ranking for a fourth time following 2008, 2010 and 2013.

Nadal has enjoyed a stellar season, capturing six titles, including two Grand Slam in the French Open and US Open and two ATP Masters 1000s.

He is the oldest player to finish year-end No 1 in the ATP world rankings history.