ATP roundup: Aleksander Kovacevic stuns top seed in Hamburg
Moderated by Tomas Kauer 
(Photo credit: Jonathan Hui-Imagn Images)
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 Sa
