Marin Cilic and Grigor Dimitrov have sealed their spots in next month's ATP Finals, leaving two spots still up for grabs in the season-ending tournament in London.
The duo join world No 1 Rafa Nadal, Roger Federer, Germany's Alexander Zverev and Austrian Dominic Thiem in the elite eight-man field after Sam Querrey lost his first-round match at the Vienna Open on Tuesday.
Croatian Cilic won the Istanbul Open in May and reached the finals at Wimbledon and Queen's Club to help earn his spot in the ATP Finals for the third time, having previously competed in the 2014 and 2016 editions.
"Third time in four years to make it to London. That was one of my goals at the beginning of the season with my team and I'm glad that we have accomplished it," world No 4 Cilic told the official ATP website.
Dimitrov's first ATP 1000 title at the Cincinnati Open in August and his Sofia Open and Brisbane International triumphs helped the 26-year-old became the first Bulgarian to qualify for the ATP Finals.
With defending champion Andy Murray still not in competitive action and Novak Djokovic and Stan Wawrinka out injured, Belgian David Goffin and Spaniard Pablo Carreno Busta are favourites to grab the remaining spots at the tournament from November 12-19, live on Sky Sports.
There are still enough tournaments for players to compile points to boost their qualification hopes - click here for the full run-down of Sky Sports events.
Sky Sports has all the action from the Erste Bank Open in Vienna and Swiss Indoors Basel this week before the Paris Masters.
The Next Gen ATP Finals in Milan and season-ending extravaganza ATP Finals at London's O2 in November end another memorable year which will be covered via our website sky.mnosports.com/tennis with live blogs and updates as the season reaches its climax.
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