Postpublished at 18:16 British Summer Time 28 June 2014
Federer looks to have Giraldo on the hook as he takes the world number 35 to deuce, but the Colombian wriggles free to hold.
Top seed Serena Williams loses 1-6 6-3 6-4 to Alize Cornet
Ivanovic v Lisicki suspended at 4-6 1-1 - bad light
Roger Federer, Maria Sharapova and Rafael Nadal win on Centre
Play resumed on outside courts at 18:00 BST after rain delay
Mike Henson and Lawrence Barretto
Federer looks to have Giraldo on the hook as he takes the world number 35 to deuce, but the Colombian wriggles free to hold.
BBC Sport's Lee McKenzie has tweeted:, external After Andy Murray's Copa-Uppy, Rafael Nadal is in the BBC office trying to win, as is John McEnroe and Tim Henman!
Stars of football and tennis have been attempting as many keepie uppies as possible with a tennis ball. How many can you do? Check out Radio 5 live's From Rio to Wimbledon challenge.
Judy Murray
Great Britain Fed Cup captain on BBC Radio 5 live sports extra
"I'm having a very nice day in the Royal Box! Great view, lovely lunch, lovely afternoon tea and there's absolutely no stress at all! I'm very excited about meeting Ian Poulter - I love colourful characters. Today he is wearing an absolutely stonking tartan checked suit!
"Andy has been very relaxed and focused. He is moving very well and when he does that he usually plays very well. It is very important in the Grand Slams to conserve energy in the first week if you can. It has been relatively straightforward for him."
First bit of pressure on the Federer serve, but coach Stefan Edberg looks unfazed up in the players' box and rightly so as Giraldo makes two errors to let the Swiss off the hook.
John McEnroe
Three-time Wimbledon singles champion on BBC TV
"Roger Federer just seems to float above the court, which helps with impact and therefore his longevity."
Relief on the face of Giraldo as the Colombian, one place off his career high ranking of 34, gets his first game of the match on the board.
Earlier we asked you which sports star in the Royal Box at Wimbledon is the greatest?
Cricket has trumped football, with Sachin Tendulkar drawing 40% of the vote, followed by Sir Bobby Charlton with 30%, David Beckham with 19% and Sir Bradley Wiggins finishing last for once, with 11%
Piers Newbery
BBC Sport at Wimbledon
"Serena Williams looks all business as she returns to Court One looking a bit like a pre-launch astronaut, decked out in white from head to toe with a thumping pair of white headphones to top off the look. She was under the cosh when her match against Alize Cornet was halted several hours ago and will resume serving at 1-1, deuce."
Federer in complete control on his serve, sending down two consecutive aces. The second is called out. Federer looks around in shock and asks the umpire what he thinks.
The umpire says he agrees with the call but Federer challenges anyway and is proved right. That's the break consolidated.
It's the old chip-and-charge approach for Federer in the next point, the Swiss racing to the net and putting the Colombian, who is ranked 35th in the world, under pressure from the off.
Giraldo crumbles and soon finds himself 0-30 down before recovering to 30-30. Federer gets his first break point of the match, but it's saved and we're at deuce. He's not so lucky next time around, ballooning a forehand way out of court. Federer breaks.
Olympic boxing gold medallist Nicola Adams on Instagram:, external Me and David Haye at Wimbledon today #champions #boxing #swag
Federer, bidding to become the first man in history to win eight Wimbledon titles, opens with a service hold.
Federer has the honour of serving first. Let's do this.
The Wimbledon master Roger Federer is out on Centre Court and knocking up with Santiago Giraldo. The stands are pretty much full, while David Beckham and his mum are still in position in the centre of the front row.
Alison Riske:, external David Beckham watched me lose to Sharapova on Centre Court at Wimbledon. I'd say that is half winning...
A Mexican wave has broken out on Court One, followed by chanting and clapping as they await the players. The court has been dressed so Serena Williams, who has dropped just five games and spent a total of one hour and 50 minutes on court in her opening two matches, and Alize Cornet should be on shortly.
Number five seed Maria Sharapova: "I felt better as the match went on Alison is a great great grass court player so I knew it was going to be tough but I got there. I am just happy to be in the second week after last year's result so I couldn't wait to come back and give myself a chance to see what I can do."
Top seed Novak Djokovic on Instagram:, external Riding a bike in the rain... :)
Miles Maclagan
Former coach to Andy Murray and Laura Robson on BBC Radio 5 live sports extra
"Sharapova did very well. She finished that in style. She will be happy with how she played. She had a mini-crisis at the start but it was no bad thing as she showed character in the way she came back.
"She is all business. She is here to do a job. As a five-time Grand Slam champion she knows it is about conserving your physical and emotional energy."
Because of the delayed start, several matches have been moved to other courts. The good news is the covers are off the outside courts now and prospects of play look good.
Here's are the court changes:
Simona Halep (Rom) v Belinda Bencic (Swi) is moving to first on court 12
Angelique Kerber (Ger) v Kirsten Flipkens (Bel) will be first on court 16
Simone Bolelli (Ita) v Kei Nishikori (Jpn) first on court eight
Jerzy Janowicz (Pol) v Tommy Robredo (Spa) first on court six