Both British number ones remain on course to scoop titles at SW19.
Dimitrov will take on Federer in the fourth round of Wimbledon on Monday (10 July).
Murray dig deep to beat the Italian 6-2 4-6 6-1 7-5.
The last time four home players reached the fourth round was in 1975.
World number one sealed a 6-3 6-2 6-2 over Dustin Brown on Centre Court.
Here's how grunting affects player's performance.
Nadal survived a few minor wobbles to make light work of Millman on Court One.
Defending champion prevails 6-1 6-4 6-2 in rain-affected first round win.
Murray has recently been troubled by a nagging hip problem.
Tennis' big four have been struggling with various issues in recent months.
The news came as the world number one gets ready to defend his Wimbledon crown.
The ear had to be sewn back on but was permanently disfigured.
The Duchess of Cambridge missed seeing Andy Murray win his first Wimbledon title.
British number one Konta suffered a heavy fall in her win over Angelique Kerber at Eastbourne.
World number one, bothered by a persistent hip issue, lands in the same half of the draw as Rafael Nadal.
The world number one is struggling with a hip injury ahead of the third major of the year.
World number one withdraws from second scheduled exhibition match at the Aspall Tennis Classic.
High-profile quartet secure top four seeds at a grand slam for the first time in three years.
The former tennis player does not expect to see a surprise winner at SW19 this year.
World number one is still expected to play in second meeting at the Aspall Tennis Classic on Friday.
Swiss to avoid that heavyweight trio until semi-finals at SW19 after defeating Mischa Zverev in Halle.
British star's Wimbledon preparations took a big hit with shock first-round defeat to Jordan Thompson.