London - Roger Federer reached his 50th Grand Slam quarter-final and 15th at Wimbledon on Monday with a 6-4, 6-2, 6-4 win over Grigor Dimitrov.
Seven-time Wimbledon champion Federer will face either Canada's Milos Raonic, the sixth seed, or German 10th seed Alexander Zverev for a place in the semi-finals.
Raonic defeated Federer in the semi-finals at Wimbledon in 2016.
Federer, 35, is also the second oldest man to make the quarter-finals at Wimbledon behind Ken Rosewall who was 39 when he reached the last-eight in 1971.
"I'm thrilled to be back in the quarters again," said Federer who took his record over Dimitrov to 6-0.
"It's very special to be in a 15th quarter-final here."
Wimbledon results on Monday, the seventh day of the 2017 championships at the All England Club (x denotes seeding):
Andy Murray (GBR x1) bt Benoit Paire (FRA) 7-6 (7/1), 6-4, 6-4
Sam Querrey (USA x24) bt Kevin Anderson (RSA) 5-7, 7-6 (7/5), 6-3, 6-7 (11/13), 6-3
Marin Cilic (CRO x7) bt Roberto Bautista Agut (ESP x18) 6-2, 6-2, 6-2
Milos Raonic (CAN x6) bt Alexander Zverev (GER x10) 4-6, 7-5, 4-6, 7-5, 6-1
Roger Federer (SUI x3) bt Grigor Dimitrov (BUL x13) 6-4, 6-2, 6-4
Tomas Berdych (CZE x11) bt Dominic Thiem (AUT x8) 6-3, 6-7 (1/7), 6-3, 3-6, 6-3
Garbie Muguruza (ESP x14) bt Angelique Kerber (GER x1) 4-6, 6-4, 6-4
Svetlana Kuznetsova (RUS x7) bt Agnieszka Radwanska (POL x9) 6-2, 6-4
Magdalena Rybarikova (SVK) bt Petra Martic (CRO) 6-4, 2-6, 6-3
Coco Vandeweghe (USA x24) bt Caroline Wozniacki (DEN x5) 7-6 (7/4), 6-4
Venus Williams (USA x10) bt Ana Konjuh (CRO x27) 6-3, 6-2
Jelena Ostapenko (LAT x13) bt Elina Svitolina (UKR x4) 6-3, 7-6 (8/6)
Johanna Konta (GBR x6) bt Caroline Garcia (FRA x21) 7-6 (7/3), 4-6, 6-4
Simona Halep (ROM x2) bt Victoria Azarenka (BLR) 7-6 (7/3), 6-2