Pablo Carreno Busta's flagging season received a boost with a hard-earned victory over third seed Fabio Fognini at the Hamburg European Open on Friday. The Spaniard, who has seen his ranking steadily decline from 23 to 59 in the world since the start of the year, booked a place in the semi-final with a 3-6, 6-2, 7-6 (7/4) win.