Fifth seed Tomas Berdych lost to German Mischa Zverev 3-6 6-2 7-6 (10-8).

BBC: Haas ends Tsonga's Halle campaign

Soderling will play Igor Sijsling in the second round after the Dutch qualifier defeated Germany's Mischa Zverev 6-7 (2-7) 6-3 7-5.

CNN: Soderling survives scare in Rotterdam

Germany's Mischa Zverev beat Teimuraz Gabashvili of Russia 6-2 6-2 6-1 to advance to his fourth quarter-final final of the season.

BBC: Jankovic battles past Dushevina

Former world number one Juan Carlos Ferrero of Spain made an early exit from the competition, beaten 4-6 6-2 6-4 by German Mischa Zverev .

BBC: SPORT | Tennis | Bogdanovic earns all-British tie

Andrey Golubev of Kazakhstan beat Germany's Mischa Zverev 6-7 6-4 7-6 and will play Victor Hanescu is the other semi-final after the Romanian eased past home favourite Michail Elgin 6-1 6-4.

BBC: Murray reaches St Petersburg semi

Fourteenth seed Tommy Robredo defeated French qualifier Michel Llodra 6-1 6-4, while 10th seed Fernando Gonzalez was handed his place in the next round when Germany's Mischa Zverev retired hurt with a wrist injury in the third set.

BBC: Nadal & Roddick query tour length