Koepka matches his career best round for lead at WGC in Memphis

Brooks Koepka watches his tee shot on the 18th hole during the first round of the World Golf Championship-FedEx St. Jude Invitational Thursday, July 30, 2020, in Memphis, Tenn. (AP Photo/Mark Humphrey)

MEMPHIS, Tenn. — Brooks Koepka has been working hard to fix his game even with an injured left knee.