A lovely switch-up from Andy Murray, sending Alexei Popyrin one way before a swish of the racquet directs a winner in the opposite direction to complete a hold of serve to 15.

The two-time Wimbledon champion is looking nice and solid so far!

At the risk of jinxing the home favourite, it has been Andy Murray who has looked the most threatening so far as both players search for a first breakthrough.

Murray closes to 40-30 but the Australian escapes again to level at 3-3.

The flags are fluttering a bit more - that shows the wind is picking up, which means things might get a bit tricky.

Some news to bring you from elsewhere at the Queen's club is that Dan Evans has been forced to retire from his match against Brandon Nakashima with injury after suffering a bad fall.

However, fellow Briton Billy Harris has beaten Argentine world number 32 Tomas Martin Etcheverry in three sets to record the biggest win of his career to date.

The crowd are already fully invested in this as they look to support Andy Murray's bid as best they can.

Alexei Popyrin suffers a slip at the back of the court, allowing Murray to pop the ball away at the net on his way to another comfortable hold of serve.

That's greeted by a big shake of the racquet from Murray - he wants more from his supporters!

That's a good hold for Alexei Popyrin - and it wouldn't be a sporting summer without a bit of Andy Murray chuntering.

A double-fault for a slightly nervous-looking Alexei Popyrin. That's fair enough, he is playing the king of Queen's after all.

Andy Murray again puts the Australian under a bit of pressure, but Popyrin holds from 30-30 to remain on serve.

Andy has that champions mentality and he's not used to losing a lot. There's been losses to players that in the past he wouldn't expect to be losing to. He's having to play and adapt around a metal hip, which is not easy. It's not quite so easy for him to push off out of some of the corners and get back.

Over at the Birmingham Classic, British women's number one Katie Boulter will soon be back in action after retaining her Nottingham Open title on Sunday.

The 27-year-old came from a set down to beat Karolina Pliskova in the Nottingham final - just hours after doing the same to topple fellow Briton Emma Raducanu.

Boulter faces Ukraine's Anhelina Kalinina later today.

Harriet Dart won her opener against Moyuka Uchijima in straight sets, but Heather Watson and Amelia Rajecki are out.

You can follow the action on BBC iPlayer and the BBC Sport website & app.

No issues for Andy Murray so far at Queen's!

The former world number one wraps up another straightforward hold of serve to the delight of the home support.

Don't forget, you can watch this match over on BBC Two and right here, at the top of the page!

There's also action from the Birmingham Classic live here.

Alexei Popyrin, the world number 48, looks to respond with a comfortable opening hold of serve of his own.

He drops a volley into the net for 40-30, but a powerful first serve down the middle gets him to safety from there.

Today is quite the landmark for Andy Murray - it will be his 1,000th tour-level match.

The former world number one joins an elite band of active players to reach four figures.

The others? Novak Djokovic (1,324), Rafael Nadal (1,300), Fernando Verdasco (1,006) and Richard Gasquet (1,004).

Murray will be hoping he can go past Verdasco and Gasquet in his second millennium before hanging up the racquet.

It's a tough test for Murray. Popyrin has come through qualifying and can do some damage on the grass. He'll know he is up against everybody's favourite and he has got a good, good game.

'Let's go' Andy Murray tells himself - and the crowd - as an accurate first serve beats Alexei Popyrin to complete a pleasing love hold to begin this contest.

I think Andy would make an amazing tennis coach - but whether or not he'd want to give up the time required to travel with a player is another thing.

Image source, BBC Sport

Nestled beneath the imposing main stand are the outside courts, which is an ideal spot for the tennis purists to grab a close-up look at the stars practising.

If you can find a spot, that is.

Image source, BBC Sport

Earlier this afternoon, plenty of fans were wandering around the tight, hedge-lined snickets which separate the courts - having a nosy and standing on tip-toes to see who they could spot.

The distinctive post-serve grunts coming from one practice court was a dead giveaway of who was behind the tarpaulin...

Andy Murray.

Image source, BBC Sport

It will be Andy Murray to serve first as he begins his final campaign at the Queen's Club.

He's welcomed to the baseline by warm applause as the crowd hope to help him along to an opening win here.

Away we go!

Andy Murray still does not think he will continue playing beyond the Olympic Games this summer, and says retiring at Wimbledon or Paris 2024 would "be fitting",

Murray, 37, said in February he was not planning to "play much past the summer" but the former world number one is still yet to confirm which will be his final tournament.

Speaking to BBC Sport at Queen's Club, Murray said he is unlikely to play at the US Open or Davis Cup later this year.

"Probably if I was going to finish my career I would rather finish at Wimbledon or an Olympic Games - to me that would probably be more fitting," Murray said.

"I've had amazing experiences and memories from Wimbledon, but also being part of British Olympics teams."

Image source, Getty Images

Andy Murray is a record five-time champion at the Queen's Club, where success in both 2013 and 2016 set him up for glory at Wimbledon.

While we do not know quite when the two-time Olympic champion will call time on his career this year, we know we are nearing the end of Murray's time on court.

Hopefully, whether here at Queen's, Wimbledon or in Paris later this summer, there are a few more Murray classics to come before then.

"My plans haven't really changed. I'm not planning to playing much past this summer," Murray said.

"I'll see how I feel in the next couple of weeks. There are lots of things to factor in to retirement from sport. I think in lots of careers, retirement is something you celebrate and people really look forward to that day – that's not something I feel. I love playing tennis.

"Ultimately, if physically you're not able to play to the level you want to, the results are not as you wish, those things factor into the decision."