HAMBURG, GERMANY - JULY 26: Filip Krajinovic of Serbia in action against Alexander Zverev of Germany during day five of the Hamburg Open 2019 at Rothenbaum on July 26, 2019 in Hamburg, Germany. (Photo by Martin Rose/Bongarts/Getty Images)
HAMBURG, GERMANY - JULY 26: Filip Krajinovic of Serbia in action against Alexander Zverev of Germany during day five of the Hamburg Open 2019 at Rothenbaum on July 26, 2019 in Hamburg, Germany. (Photo by Martin Rose/Bongarts/Getty Images)