A big burst from the returning Billy Vunipola takes Sarries up to within five metres of the Wasps line.

The hosts are finding holes in the Wasps defence at the moment as Nathan Hughes misses his tackle.

The ball is held up, and Sarries eventually get a penalty, and opt to kick to the corner.

As it is, Wasps get the line-out wrong, which allows Sarries to clear to halfway.

Sarries take the ball over half-way but a big hit from Nathan Hughes upsets Alex Lozowski and Wasps get given a penalty.

The kick to touch takes them just inside the Sarries 22.

Wasps have responded well to going behind with a bit of possession, but Saracens turn the ball over in their own 22 and look to build a counter-attack.

Nathan Hughes absorbs the first big hit after Wasps gathered the kick-off.

The number eight is making his first appearance since March, and Wasps get a penalty and kick to just over halfway.

We are under way at Allianz Park as Owen Farrell gets the match started.

Brad Barritt captains Sarries, with Joe Launcbury leading Wasps into this one.

A place at Twickenham is up for grabs.

JP Doyle is the referee in charge of proceedings.

Image source, Getty Images

The teams are out at Allianz Park.

Jackson Wray is the first man out for the hosts, flanked my his two young children, on his 200th appearance for Sarries.

The warm-ups are all done and there is nothing more either coach can do to prepare their sides for this one.

It's all about the next 80 minutes on the pitch.

Kick-off is moments away.

It was Saracens who had the upper hand over Wasps when the teams met during the regular season.

Sarries ran out 38-19 winners when the two sides met at Allianz Park back in October, and then recorded a 38-15 victory at the Ricoh Arena in January.

Saracens have won their last six Premiership matches since Exeter Chiefs beat them at Sandy Park in early March, and have lost just twice at home in the league in 2017-18, suffering defeats by the Chiefs and Leicester Tigers

Wasps go into this game having won their last Premiership games, but they may be looking back to their 64-23 win over Sarries at Allianz Park back in February 2016 for inspiration.

Wasps number eight Nathan Hughes is back from a knee injury sustained while on England duty at the Six Nations in March.

Christian Wade, Juan De Jongh and Jimmy Gopperth are named in the back line among six changes from their 39-22 win at Newcastle on the final day.

Scrum-half Dan Robson and prop Jake Cooper-Woolley return as Jack Willis reverts to blindside flanker to accommodate Hughes.

Forward James Haskell misses out with a foot injury sustained in the win over Newcastle but a fit-again James Gaskell is on the bench.

Image source, .

Replacements: TJ Harris, Mullan, Moore, Gaskell, Thompson, Simpson, Eastmond, Bassett.

England forward Billy Vunipola returns from a hamstring injury as Saracens make seven changes for the Premiership play-off semi-final against Wasps.

Sarries scored nine tries in their final game of the regular campaign, beating Gloucester 62-12.

Brother Mako is part of a new front row alongside Jamie George and Vincent Koch.

Lock George Kruis is named in the pack, while wing Chris Wyles and centre Alex Lozowski return return in the back line.

Image source, .

Replacements: Brits, Barrington, Figallo, Skelton, Rhodes, Spencer, Bosch, Earle.

Image source, Getty Images

Three-time champions Saracens, who finished the regular season in second, are aiming to reach a sixth Premiership final after missing out on a trip to Twickenham last year.

Exeter beat Mark McCall's Sarries and went on to overcome Wasps at the national stadium in the final.

Dai Young's side, who finished third this season, are hoping to lift the title for the first time since 2007-08, having won a hat-trick of trophies between 2003 and 2005.

The winners will face either Exeter or Newcastle - who meet at 15:30 BST - in the final on Saturday, 26 May.

We'll have a recap of the teams shortly.

There may be a wedding going on in Windsor but the only union that really counts today is taking place in the Premiership.

Yes, it's play-off semi-final day.

First up is a clash between Saracens and Wasps, which kicks off in about 15 minutes at Allianz Park.

Then later, Exeter Chiefs entertain Newcastle Falcons down at Sandy Park.

It is a glorious day in north London, and perfect conditions for rugby. We'll guide you through every moment from Allianz Park right here.

Image source, Rex Features