Defending champion Scottie Scheffler maintained his phenomenal record at this event - where he has finished second and first in the last two editions - with a three-hole victory over Tom Kim. World Number Three McIlroy beat Keegan Bradley in a repeat of their 2012 Ryder Cup singles clash.
Kim, a four-time PGA Tour winner, swept to a 4 and 3 victory over World No. 9 Viktor Hovland in his Group 8 match at Austin Country Club and needs only a tie in his final group match to advance out of the group stage
World No. 1 Scottie Scheffler launched his title defence with a hard-fought 1-up win over Davis Riley while second-seed Jon Rahm fell to a 2 and 1 loss to a resurgent Rickie Fowler. Korea's Sungjae Im romped to a stylish 8 and 6 victory over American Maverick McNealy.