Title holder Tiafoe to return to Stuttgart grass court tourno

American tennis player Frances Tiafoe in action against Germany's Jan-Lennard Struff during their men's singles final match of the Stuttgart Open. Defending champion Frances Tiafoe and runner-up  Jan-Lennard Struff have been confirmed as entries for the Stuttgart grass court ATP tournament in June, organizers said on Friday. Marijan Murat/dpa
American tennis player Frances Tiafoe in action against Germany's Jan-Lennard Struff during their men's singles final match of the Stuttgart Open. Defending champion Frances Tiafoe and runner-up Jan-Lennard Struff have been confirmed as entries for the Stuttgart grass court ATP tournament in June, organizers said on Friday. Marijan Murat/dpa
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Defending champion Frances Tiafoe and runner-up Jan-Lennard Struff have been confirmed as entries for the Stuttgart grass court ATP tournament in June, organizers said on Friday.

American Tiafoe won his first title on grass at last year's edition of the event which serves as a Wimbledon tune-up, beating Germany's Struff 10-8 in a final set tie-break.

"I have fond memories of this tournament," world number 16 Tiafoe said. "Everything was so relaxed, so I'm happy to be coming back to the Boss Open in Stuttgart this year."

Struff will also be present again at the June 10-16 event, after Germany's top player Alexander Zverev had announced his participation at an earlier stage.

However, Zverev's presence could depend on how he fares at the French Open, with the men's final at the Paris grand slam set for June 9, the day before the Stuttgart start.