Thiago Monteiro failed to convert a first-set lead and was eliminated from the Gstaad ATP 250 qualifiers by Swiss wildcard Dylan Dietrich.

Monteiro won the opening set but could not maintain his advantage, suffering a comeback loss in the final qualifying round. The result denies the Brazilian a place in the main draw of the Swiss clay-court event.

The defeat came one day after he had advanced with a grueling three-hour, seven-minute victory. Dietrich, ranked outside the top 400, entered the draw as a tournament wildcard.

Monteiro’s elimination marks another missed opportunity to build ranking points during the European clay season, according to TenisBrasil.