Swiss Open: Struff into last eight with tight victory over Riedi

German Jan-Lennard Struff, the No 5 seed, beat Swiss wildcard Leandro Riedi 7-6 (6), 7-6 (1) to reach the quarter-finals of the Swiss Open at the Roy Emerson Arena.

Struff, ranked No 37, will face Argentinian Tomas Martin Etcheverry, the No 4 seed, next.

In the previous round of the Gstaad tournament, the 34-year-old German won against Spaniard Albert Ramos-Vinolas (7-6 (6), 7-6 (4)).

Riedi, ranked No 134, defeated Frenchman Gregoire Barrere (7-6 (2), 7-5) in the previous round of the Gstaad tournament.

Gstaad ATP 250, other second-round results (Roy Emerson Arena, clay, EUR 579.320, most recent results first):

• Felix Auger-Aliassime vs. Yannick Hanfmann
• Daniel Elahi Galan vs. Matteo Berrettini
• Gustavo Heide vs. Ugo Humbert
• Lukas Klein vs. Quentin Halys
• Stefanos Tsitsipas (1) beat Hamad Medjedovic: 7-6 (6), 6-3
• Tomas Martin Etcheverry beat Botic van de Zandschulp: 6-2, 2-6, 6-3
• Fabio Fognini (7) beat Juan Pablo Varillas (Q): 3-6, 7-6 (5), 7-5