Rafael Nadal booked his place at the ATP Finals for a record 15th straight season with his quarter-final win over Sam Querrey at Wimbledon on Wednesday.
French Open champion Nadal triumphed 7-5 6-2 6-2 on No.1 Court to become the first player to earn a spot at the end-of-season event at the O2 Arena in London.
The 33-year-old, whose other title this season came at the Internazionali d'Italia, takes a 17-match winning run into a tantalising semi-final against eight-time Wimbledon winner Roger Federer.
Nadal has never won the Finals, his best performances coming when he finished as the runner-up in 2010 and 2013.
He has only completed seven editions of the tournament, having withdrawn during the 2017 event due to a knee problem and opted out on six occasions – ankle and abdominal issues kept him out last year.
Novak Djokovic faces Roberto Bautista Agut in the other last-four clash and victory for the world number one would see him join Nadal in guaranteeing a place in the Finals.