In the quarter-finals, Mikael Ymer knocked out Aslan Karatsev 2-1 in sets.
Against the 80th-ranked Spaniard Roberto Carballes Baena, the winning streak continued.
Ymer won the first set 6-4 and the second set was not very exciting.
Ymer played out and won 6-2.
The 24-year-old is thus ready for the semi-finals of the ATP tournament in Florence, Italy.
There he faces the winner between Alexander Bublik and JJ Wolf.