8- Brooks Koepka leads the way after 18 holes, thanks to an eight under par round of 64.
4- Koepka played the final three holes of his back nine in four under par, going birdie-birdie-eagle.
6 - The American hasn't finished outside the top 17 in his last six European Tour events.
65- Koepka's 64 is his lowest opening round on the European Tour, beating his 65s at the 2014 Omega European Masters and The 2017 Open Championship.
1- Bernd Wiesberger made a hole-in-one at the fourth hole. The Austrian used a seven-iron from 167 yards.
10- Kiradech Aphibarnrat and Haydn Porteous made ten birdies each today, one shy of Ross Fisher and Bernd Wiesberger's record 11 for the season at the Alfred Dunhill Links Championship and Maybank Championship respectively.
48- Henrik Stenson is 48 under par for his last 24 rounds in this event after opening with a round of four under par today. The Swede has finished under par in all six previous appearances here.
18- There are 18 WGC rookies in the field this week, including six European Tour members - Paul Dunne, Ryan Fox, Mike Lorenzo-Vera, Haydn Porteous, Jordan Smith and Matthew Southgate.
7- There are seven different nationalities in the top ten after the first round - United States, Malaysia, Thailand, South Africa, Ireland, China and England.
6,368- Jon Rahm made the 6,368-mile journey to Shanghai after playing in the Andalucia Valderrama Masters last week. The Spaniard opened with a level par round of 72.
