Sonia Oxley
BBC Sport at Wimbledon

Now those were loud roars from Serena as she won the set - but the crowd is even louder. No question who they want to see win.

Serena Williams will serve to get the second set under way.

Over on Centre Court, Stan Wawrinka has played his way to two set points.

Grigor Dimitrov saves the first and has the Swiss scrambling on the second, Wawrinka can't quite wrap his racquet around it.

Deuce. Dimitrov steps on the pedal. Advantage. And we're heading for a tie-break...

You can watch that one on BBC Two or by clicking on the link here.

Oh!

So unfortunate for Arantxa Rus, who has Serena completely wrongfooted, but she lobs her forehand just over the baseline.

A fist pump from Serena, who shakes her head as she sits down at the change of ends. Some American flags are fluttering in the breeze.

That is a terrific first serve from Arantxa Rus.

One set point saved, one more to go.

Martina Navratilova
Nine-time Wimbledon singles champion at Wimbledon

It is a little up and down and little inconsistent from Serena. She'll win two points then make two unforced errors. I cannot believe she has not been at the net more, as well as she is hitting the ball. Overall up and down. The wind is not helpful.

Martina Navratilova reckons Serena is going for "too much, too soon," given how windy it is.

She's got a couple of set points to play with, though, as she draws Rus into a rally and eventually the Dutch puts her backhand into the net.

* denotes next server

A blistering forehand winner down the line from Katie Swan brings up three set points for 19-year-old Brit.

Irina-Camelia Begu saves the first two, but Swan takes the next to claim the opening set.

Fantastic start for the British youngster.

Serena close her eyes as she sits in her chair, taking a minute to breathe deeply.

She... doesn't look happy, to put it mildly.

Sonia Oxley
BBC Sport at Wimbledon

They might need to think of somewhere else to keep the towels on Court One - that is the second time one of them has flown off a chair just before one of the players serves. Quick work by the ball girl. I think we’ve established it’s windy here.

"Come on!" echoes around Court One as Serena whips a first serve out wide, and Arantxa Rus sends her return into the net.

Rus will serve to stay in the set, again.

An excellent return of serve from Arantxa Rus - Serena really put some extra fizz into that one - puts her in the perfect position for a backhand winner at 30-15.

More good defence from the Dutch draws the error out of Serena's cross-court forehand, but an extended rally goes Serena's way and she lets out a huge roar.

It's 40-30...

Katie Swan looks to be on her way to taking the first set against Irina-Camelia Begu.

She edged her way to 4-2 lead against the world number 33 and then took several deuces to close out for 5-2.

It leaves Begu serving to stay in the first set. Here's how the pair match up...

Becky Grey
BBC Sport at Wimbledon

Are these Roger Federer’s biggest fans?

They set up camp in the queue at 08.30 BST on Saturday morning. That’s 52 hours of waiting…for one hour and 19 minutes of Roger Federer.

But they’re in high spirits and insist that’s not the end of their Wimbledon journey. They’re watching the next match on Centre and are then heading straight back to the queue where they’ll remain until Federer’s second-round match on Wednesday.

The group met on a Federer forum online and now, united by their love for the eight-time Wimbledon champion, they come to the Championships together every year.

“We’re exhausted,” said Scarlett Li (arguably the most committed member of the group – this is her ninth Wimbledon). “As long as Roger is here, I’ll be camping. I go to all the Grand Slams. Roger knows my name now and he says it’s always lovely to see his fans.”

Image source, BBC Sport

An off-balance Serena whips a forehand into the net, and it's advantage, Rus.

The American goes down the line, but it's long, and Rus holds.

A double fault for Arantxa Rus, serving to stay in the set, first up.

Serena isn't finding those body serves easy, though, and she lets out a huge yell of frustration as she plonks successive backhand into the net.

30-30 quickly becomes 40-30 as a return of serve drifts long, but the Dutch errs on her backhand to send proceedings to deuce.

Kim Clijsters
Former world number one at Wimbledon

We've seen some clean hitting from Serena, mixed with some easy unforced errors. With her it can change within two points, she'll find her rhythm, get really passionate and play some of her best tennis.

Somewhere in front of the ball boy with the parasol was Britain's Katie Swan after the first few games.

At that point she must have been thinking, "I'd like to break Irina-Camelia Begu soon".

She did. Then held serve.

When Serena Williams broke early you might have thought she would be in for a comfortable afternoon but Arantxa Rus had other ideas, breaking straight back.

You can watch both break points below.

A swinging ace goes beyond Arantxa Rus to put Serena 30-0 up.

Another huge first serve goes bursting through Rus' defence - just the 114mph, that one - and a shank off Rus' racquet ensures Serena holds to love.