Plenty at stake as Murray, Federer, Djokovic eye semifinals

LONDON, United Kingdom – Defending champion Andy Murray will retain his world number one ranking if he makes the Wimbledon semifinals Wednesday, July 12, while Roger Federer defies age and Novak Djokovic fights a shoulder injury.

Adding extra spice to Wednesday's drama is a growing concern over the state of the All England Club's famed Centre Court where, according to Djokovic, a hole has developed.

Murray, one of 5 men over 30 in the last-8, faces big-serving Sam Querrey bidding to make his eighth Wimbledon semifinal in the last 9 years.

The world number one is also in his 10th straight quarterfinal at the tournament and has reached the last-8 at 24 of the last 26 Slams.

He leads Querrey 7-1 with the 29-year-old American's only win coming in Los Angeles 7 years ago.

Murray also won their previous clash at Wimbledon in the fourth round in straight sets in 2010.

But the two-time champion won't underestimate the player who knocked out Djokovic in the third round 12 months ago.

"Sam likes the conditions here. Obviously a big serve. Goes for his shots. Very aggressive player," said Murray who has made the last-8 despite lingering worries over a hip injury.

"When he's standing up on the baseline, hitting forehands, dictating, he's a very dangerous player."

Querrey made the quarter-finals in 2016 where he lost in 4 sets to eventual runner-up Milos Raonic.

He has needed two successive 5-set matches to get to the last 8, seeing off French 12th seed Jo-Wilfried Tsonga and Kevin Anderson.

Querrey has also sent down 99 aces, just 3 behind tournament leader Gilles Muller, the conqueror of Rafael Nadal.

The world number 28 will also attempt to become the first American in the semifinals since Andy Roddick finished runner-up in 2009.

With Nadal out of the picture, Murray will be assured of remaining as world number one with victory on Wednesday.

Federer, playing his 100th match at the All England Club, attempts to reach his 12th Wimbledon semifinal and stay on course for a record eighth title when he faces Raonic.

However, the 35-year-old Swiss star is wary of the sixth-seeded Canadian who knocked him out in the semifinals in 2016 in what proved to be Federer's last match of the season.

Relaxed

Federer leads Raonic 9-3 in head-to-head meetings and has reached his 50th Grand Slam quarterfinal without dropping a set.

"I've not had the most toughest matches. I can look at this quarterfinal in a totally relaxed fashion. Physically I'm not fighting anything like last year with my knee," added Federer, bidding to become the tournament's oldest champion in the Open era.

Raonic, runner-up to Murray last year, is bidding to make the semifinals for the third time.

However, while Federer has not dropped a set, the big Canadian needed 5 sets to see off highly-rated German Alexander Zverev in the last-16.

Djokovic takes a staggering 25-2 career record over Czech 11th seed Tomas Berdych into his quarterfinal as he eyes a potential semifinal duel with Federer.

Second seeded Djokovic needed a medical timeout to treat a long-standing right shoulder injury in his last-16 clash with Adrian Mannarino.

He also claimed a hole had opened up on the service line on the Centre Court.

"The courts are not great this year – I've played on better courts," said Djokovic.

Berdych hasn't defeated Djokovic since 2013 but he did triumph over the Serb at Wimbledon in the semi-finals seven years ago when the Czech finished runner-up to Nadal.

In the day's other tie, 34-year-old Muller makes his maiden appearance in the last-eight after knocking out Nadal, his first win over a top five player in 23 attempts.

The Luxembourg player's only other Grand Slam quarterfinal came in 2008 when he lost to Federer at the US Open.

He trails last-8 opponent Marin Cilic 2-0 but he has been in fine form on grass this summer, winning the title at 's-Hertogenbosch and reaching the semifinals at Queen’s where he lost to Cilic.

Cilic, the 2014 US Open champion, is in the quarterfinals for a fourth successive year.

He has lost in the last-eight in each of the last 3 years – falling to Djokovic in 2014 and 2015, and to Federer in 5-sets last year despite holding a 2-0 lead. – Dave James, Agence France-Presse/Rappler.com