Andy Murray overcame a giant obstacle to keep his dream of a second Wimbledon title alive as he battled into the quarter-finals.
The 28-year-old needed three hours and three minutes to beat 6ft 10in Ivo Karlovic, the tallest player on the men's tour.
He described the match against the Croation beanpole as "mentally tiring", and will face Vasek Pospisil in the next round.
Murray's wife Kim, comedian Michael McIntyre and a clutch of top golfers including Lee Westwood and Ian Poulter were at Centre Court to support him.
Pippa Middleton was spotted at SW19 wearing a floral print dress and wedges, a day after her niece Princess Charlotte was christened.
Celebrities also graced Serena Williams's toe-to-toe battle with older sister Venus.
All Of Me singer John Legend, 36, posed for a courtside Instagram picture with his model girlfriend Chrissy Teigen.
Teigen, 29, showed off her legs in a knitted number in cream, red and black with heels.
Canadian rapper Drake was also back among Serena's entourage after he was spotted at the All England Club last week.
After progressing to the quarter-finals, she said: "It's been six years since we played each other. I just really was enjoying the moment out there.
"It was such a great vibe, such a great situation to be in, when we were both so young and dreaming of coming to Wimbledon."
Earlier in the day temperamental Nick Kyrgios crashed out of the tournament after appearing to throw an entire game in protest at receiving yet another warning for his antics.
It came after he was slapped with a code violation for swearing during his last-16 match against France's Richard Gasquet.
The 20-year-old Australian spent the next game refusing to play the ball, with BBC presenter Sue Barker commenting: "I have never seen anything like it at Wimbledon."
He was later involved in a spat with British umpire James Keothavong - the brother of former player Anne Keothavong - as he took time to change his socks between games.
"Mate, Rafa (Rafael Nadal) and stuff play 30 seconds in between points every time and all I'm doing is putting my sock back on," he told the official.
Gasquet also had an outburst after the third set which saw him smash his racquet when he let two match points slip.
Kyrgios could face a hefty fine of up to 20,000 US dollars (£12,860) if he is judged to have thrown a game.
His winnings for reaching the fourth round in the men's singles come to £127,000.
After the match his mother Nill tweeted: "You fought hard little fella. Just remember adversity is the building blocks for success, learn from them and grow."
Wimbledon great Roger Federer progressed to the next round as he tries to take his tally of titles at the All England Club to a record eight.
Reporters were told to "stick to tennis questions" after Denmark's Caroline Wozniacki was asked about an ankle injury suffered by her golf champion ex-fiance Rory McIlroy.
The BBC announced today that it was changing the format of its revamped Wimbledon 2Day highlights show after it was panned by critics and viewers.
From this evening the BBC2 programme, hosted by Clare Balding, will move to a studio above Centre Court and its live audience will be axed.
Questions were raised after the round-up show was broadcast last week from a studio in the private members' Gatsby Club, close to Wimbledon, which was hired for an undisclosed fee.
Viewers also criticised the programme's informal style, with some comparing it to satirical comedy W1A.
The All England Club confirmed that it would observe the minute's silence to commemorate the 10th anniversary of the London 7/7 bombings tomorrow at 11.30am.
A spokesman said: "Play on all courts, except Centre Court and No 1 Court, will start at 11.45am instead of 11am."
Centre Court and Court 1 usually start play at 1pm.
It comes after an emotional minute's silence was held at midday on Friday in memory of the victims of the Tunisia beach massacre.