Borna Coric of Croatia hits a return during the semifinal match against Roberto Bautista Agut of Spain at the Gerry Weber Tennis Open on June 23, 2018 in Halle, Germany. Roberto Bautista Agut withdrew from the match due to an injury while Borna Coric entered the final. (Photos: Xinhua/Joachim Bywaletz)

Roberto Bautista Agut of Spain reacts after an injury during the semifinal match against Borna Coric of Croatia at the Gerry Weber Tennis Open on June 23, 2018 in Halle, Germany. Roberto Bautista Agut withdrew from the match due to an injury while Borna Coric entered the final.

Borna Coric of Croatia hits a return during the semifinal match against Roberto Bautista Agut of Spain at the Gerry Weber Tennis Open on June 23, 2018 in Halle, Germany. Roberto Bautista Agut withdrew from the match due to an injury while Borna Coric entered the final.

Borna Coric of Croatia hits a return during the semifinal match against Roberto Bautista Agut of Spain at the Gerry Weber Tennis Open on June 23, 2018 in Halle, Germany. Roberto Bautista Agut withdrew from the match due to an injury while Borna Coric entered the final.