Ben Shelton Ben Shelton arrives in Stuttgart as the top seed and the tournament favorite. The American reached the semifinals on his tournament debut last year and possesses a game perfectly suited to grass. After an underwhelming clay-court swing, he will be looking to make a strong start to the summer.
Taylor Fritz
Taylor Fritz returns as the defending champion and one of the most accomplished grass-court players on tour. The American has enjoyed plenty of success on the surface throughout his career and will be eager to make up for a relatively disappointing clay season. His powerful serve and aggressive baseline game make him a major title contender once again.
Alexander Bublik
Alexander Bublik remains one of the most dangerous opponents on grass when he is at his best. The Kazakh's huge serve and unpredictable shot-making can trouble any player in the draw, as he has shown repeatedly on fast courts. A quarterfinalist here last year, he has the tools to put together another deep run.
Jiri Lehecka
Jiri Lehecka heads into Stuttgart full of confidence after an excellent clay-court swing that lifted him to a career-high ranking of world No. 12. His aggressive baseline game and improved consistency have made him a threat across all surfaces. The Czech is defending quarterfinal points this week and will be aiming to continue his rise towards the top 10.