キース・サーマン
On January 26, 2019, Lopez challenged Keith Thurman for the WBA welterweight title. Lopez was ranked at #7 by the WBA. Thurman started off the fight strong, dropping Lopez in the second round. Thurman mostly dominated the first part of the fight. Lopez, however, turned the tables in the second part of the fight, hurting and almost finish Thurman in the seventh. Lopez tried to finish the fight early but was unable to. While one of the judges had it a draw, 113-113, the two other judges saw Thurman as the clear winner, scoring the fight 117-109 and 115-111 in favor of the champion.