London - Seven-time Wimbledon champion Roger Federer is looking increasingly untouchable at the All England Club after making the quarter-finals without being broken and boasting a remarkable serving sequence.
The 33-year-old reached his 13th quarter-final at the All England Club on Monday with a 6-2, 6-2, 6-3 win over Spain's Roberto Bautista Agut.
His 96-minute win meant that in four rounds he has yet to drop his serve.
He has faced just two break points in 58 service games and committed only three double faults as he continues his quest for a record eighth Wimbledon title and the honour of being the oldest champion at the tournament in the Open Era.
The last time he dropped serve was in the second set of his opening round win over Philipp Kohlschreiber in Halle - more than 100 service games ago.
"Maybe the guys are returning terrible," joked Federer.
"I got things figured out at the moment. Clearly having the extra week (between the French Open and Wimbledon) helped me be perfectly prepared for Wimbledon.
"So I think there were fewer question marks going into this tournament. In Halle I could have easily lost in the first round. I was down 5/4 in the tie-breaker. Fast conditions, late at night, slippery. I was lucky to get through that one."
"Once I got through that one, I really was able to feel better, serve more consistent. Just focusing, point per point. Especially on grass, that's what it takes. I did a good job."
Federer had John McEnroe applauding his performance from up in the television commentary box.
"It's hard not to see Federer facing Murray in the semi-finals with the way things are panning out right now. Roger is making it look oh so easy, time and again," said the US legend.
The Swiss next faces France's Gilles Simon and wasn't getting too carried away with his chances of an 18th Grand Slam title.
"Gilles Simon is one of the best return players we have in the game. I would think I'll be tested a lot. So that streak's maybe coming to an end, in my opinion," added Federer.
Federer is scheduled to tackle 2013 champion Murray in the semi-finals should the Briton see off unseeded Canadian Vasek Pospisil in his last-eight clash.
"I don't think I made a statement. It was nice to play a baseliner (Bautista Agut) after two big servers (Sam Querrey and Sam Groth). I did a nice job making the transition," Federer said.
"Clearly I felt I had more time on the return, still was able to play aggressive tennis, committed on the return as well, which sometimes all of a sudden if you have time, you tend to just get it in and get the rally started."
Federer holds a 5-2 career lead over Simon who reached his maiden All England Club quarter-final by knocking out 2010 runner-up and sixth seed Tomas Berdych.
Results at Wimbledon on Monday, the seventh day of the 2015 championships at the All England Club (x denotes seeding):
Marin Cilic (CRO x9) bt Denis Kudla (USA) 6-4, 4-6, 6-3, 7-5
Stan Wawrinka (SUI x4) bt David Goffin (BEL x16) 7-6 (7/3), 7-6 (9/7), 6-4
Richard Gasquet (FRA x21) bt Nick Kyrgios (AUS x26) 7-5, 6-1, 6-7 (7/9), 7-6 (8/6)
Vasek Pospisil (CAN) bt Viktor Troicki (SRB x22) 4-6, 6-7 (4/7), 6-4, 6-3, 6-3
Andy Murray (GBR x3) bt Ivo Karlovic (CRO x23) 7-6 (9/7), 6-4, 5-7, 6-4
Gilles Simon (FRA x12) bt Tomas Berdych (CZE x6) 6-3, 6-3, 6-2
Roger Federer (SUI x2) bt Roberto Bautista (ESP x20) 6-2, 6-2, 6-3
Suspended due to darkness:
Novak Djokovic (SRB x1) level with Kevin Anderson (RSA x14) 6-7 (6/8), 6-7 (6/8), 6-1, 6-4
Serena Williams (USA x1) bt Venus Williams (USA x16) 6-4, 6-3
Victoria Azarenka (BLR x23) bt Belinda Bencic (SUI x30) 6-2, 6-3
Maria Sharapova (RUS x4) bt Zarina Diyas (KAZ) 6-4, 6-4
Coco Vandeweghe (USA) bt Lucie Safarova (CZE x6) 7-6 (7/1), 7-6 (7/4)
Garbie Muguruza (ESP x20) bt Caroline Wozniacki (DEN x5) 6-4, 6-4
Timea Bacsinszky (SUI x15) bt Monica Niculescu (ROM) 1-6, 7-5, 6-2
Madison Keys (USA x21) bt Olga Govortsova (BLR) 3-6, 6-4, 6-1
Agnieszka Radwanska (POL x13) bt Jelena Jankovic (SRB x28) 7-5, 6-4