Britain's Gordon Reid has made it through to the inaugural men's wheelchair singles final with a 7-6 6-4 win over Joachim Gerard of Belgium over on Court 17.

The 24-year-old from Scotland won the Australian Open singles at the start of the year before finishing runner-up at the French Open last month.

Image source, Getty Images

Here we go then. An expectant hum fills Centre Court as spectators filter down gangways and shuffle through to find their seat.

Even the line judges get a splattering of applause as they appear from backstage.

After two rip-roaring see-sawing quarter-finals on Wednesday, there is a collective lip-smacking for the two matches on show today.

We just await the two protagonists.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

Milos is extremely well prepared, he's learned a bit. I felt watching the match two years ago, commenting on it, he was overwhelmed and tight. 

It's easy to say 'just enjoy it', there's going to be about eight people on his side when this match starts and this is something he's going to have to overcome. 

He's got to start banging the ball right from the first shot he hits, impose himself. He's got an unbelievable serve, a great forehand. he's got to play the way Pete Sampras used to play.

MD: Agassi is GOAT. Only player thus far to win the four slams, the Tour Finals and Olympic Gold.

Don Uorri: Fed may have more GS titles than anyone else, but he was lucky re timing, how many did he win once Nadal, Nole & Andy came along?

Ash Khan: GOAT has to be Nadal, GS record (1 Aus Open away from 2 career slams) along with record against rivals & era played in.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

I'm amazed by how badly Roger still wants it. That's one of things that impresses me about Roger is that he's still willing to dig deep. 

Lleyton Hewitt
Former Wimbledon champion on BBC TV

We haven't seen it for such a long time. Djokovic going out has opened it up for Milos but I'm sure at the back of Roger's mind is 'this is someone I've lost to in the last two Wimbledon finals' and it gave him a sense of opportunity.

Boris Becker, Novak Djokovic's coach, has been talking on BBC Two about the world number one, who suffered a shock third-round defeat by American Sam Querrey.

"It was a disappointing loss last Saturday, but you can't win them all - he is human," says Becker, the six-time Grand Slam winner.

"He has won four (Grand Slams) in a row but Sam Querrey was the better player on the day on Friday and rain interruptions on Saturday came at the wrong time but Sam played well under pressure.

"Novak has had a week off, he is back home with his family in Monte Carlo and is taking it easy. I'm sure he will be watching the semi-finals."

Wilko Wilkes: Murray in straight sets and Federer in four, I've had a vision like Joseph & his amazing technicolour umpires blazer.

Stephen Kwesi Assan: Raonic to give Federer a tough match but Federer to make it to the final after four.

Kerry Liu: Really hoping Roger is on form today, not sure my nerves can handle another five-setter.

Milos Raonic has been knocking on the door for a Grand Slam final, but he's not been let in yet.

He was a semi-finalist here in 2014, where he lost in straight sets against Roger Federer, and the Canadian sixth seed also reached the Australian Open semis earlier in January.

One key result he also got this year was his first win against today's opponent, Federer, in the Brisbane Open final. 

Image source, Getty Images

Clear your diaries sport fans. If this video doesn't whet your appetite for Sunday then I don't know what will. 

Marc Westcott: GOAT has to be Federer. Watching him glide around a court is majestic. Plus his longevity is outstanding.

Tevon: Rafael Nadal because he's won nine French Opens, beaten Federer at Wimbledon and the rest of the big four at slams too.

Adam Clift: Novak Djokovic - Held all four Slams at once, will beat Roger Federer's total and in a much harder era with harder Slam final opponents.

Two semi-finalists make the top five for the most tour-level wins in 2016 - Milos Raonic and Andy Murray.

At the top of the stack is rising star Dominic Thiem. 

The 22-year-old is ranked number eight in the world and has collected four ATP titles this year. 

He couldn't make it past the second round at Wimbledon, though. 

Image source, .

Jas Ghata-Aura: I think Murray wins in four. Raonic will be tough for Roger Federer; I see Raonic winning that in five.

Jacob Wright: Another great day of tennis and a bad day for dissertation writing lined up.

Laura: So excited for today's tennis. How is it semi-finals already?

Britain's Gordon Reid has taken the first set in the semi-final of the men's wheelchair singles over on Court 17 against Belgium's Joachim Gerard.

You can watch the match via this link

No, not this furry fella.

Image source, Getty Images

But what about these guys?

Image source, Getty Images

We want you to pick your GOAT - who you would consider the greatest of all time in men's tennis. 

Is it three-time Wimbledon winner John McEnroe? The great Rod Laver, who won 11 Grand Slams? What about today's semi-finalist Roger Federer?

Let us know your thoughts on Twitter via #bbctennis, external. You can also vote via the tab at the top of this page.