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HALLE, GERMANY - JUNE 22: Roger Federer of Switzerland celebrates after winning his half final match against Pierre-Hugues Herbert of France during day 6 of the Noventi Open at Gerry Weber Stadium on June 22, 2019 in Halle, Germany. (Photo by Thomas F. Starke/Getty Images)

HALLE, GERMANY - JUNE 22: Roger Federer of Switzerland celebrates after winning his half final match against Pierre-Hugues Herbert of France during day 6 of the Noventi Open at Gerry Weber Stadium on June 22, 2019 in Halle, Germany. (Photo by Thomas F. Starke/Getty Images)