Spains Jon Rahm strengthened his odds of winning the Hurry to Dubai of the European Tour by shooting at a 66 to discuss the lead.
The name will be taken by rahm if wins Sunday and money-list pioneer Bernd Wiesberger does not come next.
Austrian Wiesberger is struggling about two under overall, 13 behind Rahm.
If he won the championship, englands Tommy Fleetwood, who would also win the Race to Dubai, is four adrift of all Rahm.
Northern Irelands Rory McIlroy, who is not able to win the Race to Dubai, proceeded to within two shots of Rahm and Frenchman Mike Lorenzo-Vera, who is currently aiming to become the first winner of the Tour Championship.
The tournament provides a world record $3m (#2.3m) cheque for the winner at Jumeirah Golf Estates Earth class.
McIlroy shot a seven-under-par 65 to proceed to 13 under.
The winner began with two birdies which set the tone, then selecting an eagle on the top and a birdie on the next hole because he made the turn five under.
Until McIlroy got himself out of trouble on the 18th, scrambling for a par following a strategy, another 2 birdies followed , at the 14th and 16th.
The tournament was started by five players with a $ 5m bonus pool, with a chance of winning the season-long Race to Dubai.
And youll find a variety of ways any of the quintet can win the title, dependant on how their rivals fare.
Wiesberger started the third round to Dubai rankings at the top of the Hurry, but a 73 watched him drop to two under for the championship, opening the door for Rahm.
The Ryder Cup player carded a refined 66, and opened a sizable gap over his closest challenger in the Rush.
Rahm – that would become the second Spaniard to win on the Rush after the late Seve Ballesteros, to Dubai, or its predecessors that the Order of Merit – produced seven birdies, including a person on the 18th.
The Matt Fitzpatrick of England and open champion Shane Lowry both will need to win the championship but then their hopes of winning the general title are slim. Lowry will begin the last round 10 shots from Rahm, with Fitzpatrick eight straight back.
The Robert MacIntyre of scotland sealed the European Tours rookie-of-the-year name – since the best-placed debutant in the Race to Dubai positions – which moved him 10 shots clear of closest rival Kurt Kitiyama.
The 23-year-old out of Oban reeled off six birdies – five in the opening seven holes – since he transferred to 3 under for the championship, whereas Kitiyama, by the USA, carded a 77 to complete over with one round to playwith.
MacIntyre was just 1 shot ahead of his rival at the beginning of the next round, and went into the championship in 11th place at the Race one place ahead of Kitiyama.
Barring a staggering turnaround on the final day, the young Scot, who finished sixth on his Open debut at Royal Portrush this year and has maintained seven top-10 finishes in 2019, will combine the likes of Rahm, Brooks Koepka, Sergio Garcia, Nick Faldo and Sandy Lyle in winning the Sir Henry Cotton Rookie of the Year award.

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