Florian Mayer

Jan-Lennard Struff's 7-6(7/4), 6-4, 6-1 win over Hubert Hurkacz of Poland in Sunday's final match saw Germany narrowly avoid their first relegation from the Davis Cup's elite group for 13 years

Roger Federer, who last played in a third-round Rome Masters loss to Dominic Thiem, then missed the French Open, is building for another run at Wimbledon, where he is a seven-time champion

World number two and top seed Roger Federer defeated Germany's Florian Mayer 6-0, 7-6 (7/1) as he continues his build-up to an assault on an eighth Wimbledon title.

Roger Federer defeated Latvian Ernests Gulbis 6-3, 7-5 and will next face Florian Mayer in the quarters.

David Ferrer dropped the opening set in a tiebreaker before going on to win 6-7 (5/7), 7-5, 6-2, 6-1 in just under three hours on Hisense Arena.

Murray lost 3-6, 6-4, 6-2 to Florian Mayer, the world number 40 from Germany, who seemed more surprised than anyone at how the contest turned around.

Andy Murray was leading 6-3, 3-0 when the 40th-ranked Mayer started to play more aggressively, going for winners on nearly every shot. Murray's lead evaporated as he only won three of the last 15 games in the one hour, 51 minute match.

In Saturday's semifinals, del Potro will play doubles specialist Edouard Roger-Vasselin of France, who beat Daniel Brands of Germany 6-3, 4-6, 6-3.

Del Potro had 27 winners and only eight unforced errors in a 6-3, 6-3 win over Spain's Nicolas Almagro. Tsonga beat Germany's Florian Mayer 6-2, 6-3.

After Kohlschreiber and Florian Mayer picked up wins for Germany in Friday's singles rubbers, Brazil pulled the score back to 2-1 in Saturday's doubles, before Brands's decisive win.

Andy Murray, the reigning Olympic and Wimbledon champion, will next face Uzbekistan's world number 65 Denis Istomin, who put out Italian 20th seed Andreas Seppi, 6-3, 6-4, 2-6, 3-6, 6-1.

Mayer double-faulted to lose the 29-minute opening set and never made an impression on the top seed.

Tomic lost to German Florian Mayer. He will now have to hit the practice courts after missing a chance to build up some valuable hardcourt experience before the start of the US Open in three weeks.

The Swiss top seed dug deep to claim the third set against

Federer, who faces Germany's Florian Mayer in Friday's quarter-final, squandered 10 of his 13 break points against Hajek, including five match points in the eighth game of the second set, but prevailed in 72 minutes.

Jan-Lennard Struff's 7-6(7/4), 6-4, 6-1 win over Hubert Hurkacz of Poland in Sunday's final match saw Germany narrowly avoid their first relegation from the Davis Cup's elite group for 13 years

Roger Federer, who last played in a third-round Rome Masters loss to Dominic Thiem, then missed the French Open, is building for another run at Wimbledon, where he is a seven-time champion

World number two and top seed Roger Federer defeated Germany's Florian Mayer 6-0, 7-6 (7/1) as he continues his build-up to an assault on an eighth Wimbledon title.

Roger Federer defeated Latvian Ernests Gulbis 6-3, 7-5 and will next face Florian Mayer in the quarters.

David Ferrer dropped the opening set in a tiebreaker before going on to win 6-7 (5/7), 7-5, 6-2, 6-1 in just under three hours on Hisense Arena.

Murray lost 3-6, 6-4, 6-2 to Florian Mayer, the world number 40 from Germany, who seemed more surprised than anyone at how the contest turned around.

Andy Murray was leading 6-3, 3-0 when the 40th-ranked Mayer started to play more aggressively, going for winners on nearly every shot. Murray's lead evaporated as he only won three of the last 15 games in the one hour, 51 minute match.

In Saturday's semifinals, del Potro will play doubles specialist Edouard Roger-Vasselin of France, who beat Daniel Brands of Germany 6-3, 4-6, 6-3.

Del Potro had 27 winners and only eight unforced errors in a 6-3, 6-3 win over Spain's Nicolas Almagro. Tsonga beat Germany's Florian Mayer 6-2, 6-3.

After Kohlschreiber and Florian Mayer picked up wins for Germany in Friday's singles rubbers, Brazil pulled the score back to 2-1 in Saturday's doubles, before Brands's decisive win.

Andy Murray, the reigning Olympic and Wimbledon champion, will next face Uzbekistan's world number 65 Denis Istomin, who put out Italian 20th seed Andreas Seppi, 6-3, 6-4, 2-6, 3-6, 6-1.

Mayer double-faulted to lose the 29-minute opening set and never made an impression on the top seed.

Tomic lost to German Florian Mayer. He will now have to hit the practice courts after missing a chance to build up some valuable hardcourt experience before the start of the US Open in three weeks.

The Swiss top seed dug deep to claim the third set against

Federer, who faces Germany's Florian Mayer in Friday's quarter-final, squandered 10 of his 13 break points against Hajek, including five match points in the eighth game of the second set, but prevailed in 72 minutes.