World silver medallist Tyson Gay overhauled former world record holder Asafa Powell to win the men's 100 metres at the World Athletics Final.
Gay, the second fastest man ever behind Olympic and world champion Usain Bolt, edged Powell on the line to win by two-hundredths of a second in 9.88 seconds.
Bolt will run in the 200 metres.
Asked if he could ever catch up with Bolt, Gay replied: "It's difficult to say. I've overcome my groin injury now and I do believe I can run 9.60 or under."
Bolt reduced his own world 100 record to 9.58 seconds at the Berlin world championships last month.
Olympic champion Yelena Isinbayeva, who failed to clear a height in Berlin, was unable to break her own world pole vault record of 5.06 netres set in Zurich last month.
But the Russian said she thought she could still better the record this year with meetings to come in Shanghai and Daegu, South Korea.
The men's 3,000 metres provided one of the highlights of the evening as Ethiopia's 5,000 world champion Kenenisa Bekele and Bernard Lagat of the United States reprised their epic Berlin battle.
Lagat, who took silver behind Bekele in Berlin, attacked on the final straight but in another exciting sprint finish Bekele repulsed his rival's challenge, holding on to win in 8:03.79.
The loudest cheer of the night was reserved for Bolt, who has confirmed that the meeting will be his last of year.
The 23-year-old Jamaican entered the stadium midway through the session to give the fans an official greeting and his famous "Lighting Bolt" celebration jig.
He then promised "something special" in Sunday's 200.