ATP roundup: Aleksander Kovacevic stuns top seed in Hamburg

Lucky loser Aleksandar Kovacevic rallied to stun No. 1 seed Felix Auger-Aliassime of Canada 4-6, 7-5, 6-4 at the Hamburg Open on Wednesday in Germany.

ATP roundup: Aleksander Kovacevic stuns top seed in Hamburg. Lucky loser Aleksandar Kovacevic rallied to stun No. 1 seed Felix Auger-Aliassime of Canada 4-6, 7-5, 6-4 at the Hamburg Open on Wednesday in Germany. Kovacevic trailed 4-1 in the deciding set before winning five straight games to beat the fifth-ranked player in the world and become the first American to reach the Hamburg quarterfinals since Andre Agassi and Pete Sampras in 1995. No. 5 seed Karen Khachanov of Russia and No. 8 Frances Tiafoe were also upset. Khachanov's rally came up short in a 6-3, 3-6, 7-6 (3) loss to France's Ugo Humbert, while Tiafoe was tightly swept 7-6 (3), 7-6 (4) by Camilo Ugo Carabelli of Argentina. No. 6 Tommy Paul joined Kovacevic as an American Hamburg quarterfinalist by rallying in the Wednesday resumption of his 6-7 (5), 7-6 (5), 7-6 (7) defeat of...