Hamburg Open: Fils into semi-finals as Rune retires with knee injury

Frenchman Arthur Fils, the No 5 seed, advanced to the semi-finals of the Hamburg Open when Dane Holger Rune, the second seed, retired with a knee injury at the Rothenbaum Tennis Center.

Fils, ranked No 28, led 6-4, 4-1 when Rune called time on the match.

The injury is a worry for the Dane with the Olympics just one week away, but the hope will be that this was precautionary more than anything else.

The 20-year-old Frenchman, who was playing very well until the sudden end to the match, will play Argentinian Sebastian Baez, the No 3 seed, next.

In the previous rounds of the Hamburg tournament, Arthur Fils won against Spaniard Jaume Munar (5-7, 6-3, 6-1) and Serb Laslo Djere (7-6 (3), 6-2).

The 21-year-old Dane beat Hungarian Fabian Marozsan (6-4, 6-4) and Argentinian qualifier Marco Trungelliti (6-4, 6-3) earlier in the tournament.

Hamburg ATP 500, other last-eight results (Rothenbaum Tennis Center, clay, EUR 1.891.995, most recent results first):

• Alexander Zverev vs. Zhizhen Zhang
• Francisco Cerundolo vs. Pedro Martinez
• Sebastian Baez beat Luciano Darderi (7): 2-6, 6-4, 6-4