That's nice from Fikayo Tomori - he chips a pass over from his own half right into the path of Tammy Abraham.

The striker takes aim from the right of the area, but it's badly askew and the ball rolls right across the face of goal and out for a goal kick.

United get a rare spell of possession by the corner flag after Kurt Zouma gave the ball away for a throw in, but George Baldock's pass is too heavy and the home side can take a breather with a goal kick.

Image source, Reuters

John Egan grips on to much of Tammy Abraham's shirt right in front of the ref as a clearance drops towards them - but there's nothing given, to the anger of much of the crowd at Stamford Bridge.

The Blades win the first corner of the game with a rare attack. It's fired in low, and Tammy Abraham, on the near post, nods it firmly away from goal.

Image source, Reuters

George Baldock slips over after taking the ball down just outside his own box and for a second Mason Mount looks interested - but Stuart Atwell blows for a foul on the Blades defender by Mount.

Tammy Abraham gets between two defenders inside the box and nicely takes the pass down off his chest, but Jack O'Connell quickly snuffs out the half-chance.

Chelsea are seeing most of the play so far, and when Oliver Norwood tries to clear to find Callum Robinson, the pass is short and Chelsea get it back. The Blades won't be able to afford to give it away like that all afternoon.

It's keeper to keeper as a Dean Henderson clearance goes over everyone and all the way to Kepa. There's been nothing around either area so far.

There's an early touch for Dean Henderson, who has to come to the edge of the box to volley a bouncing ball over the top away.

And there's a first touch for Fikayo Tomori as a long pass goes down to the other end.

And we're under way, with Sheffield United kicking off.

The teams are out on an overcast afternoon in west London, under the watchful eye of referee Stuart Attwell.

Fikayo Tomori made a substitute appearance for Chelsea in the Super Cup against Liverpool, but Frank Lampard saw a lot of the Canadian during his loan spell at Derby last season.

Before that, he had a season-long loan at Hull and a six-month stint at Brighton.

Speaking just after the teams were announced, Lampard said Tomori "had trained really well and deserves his chance."

Image source, AFP

Blades boss Chris Wilder was not impressed by his side's efforts in their 2-1 defeat by Leicester last week, even if the team's fans were.

"I don't see why that should get an applause," was his forthright assessment. There was, he said, "a lot to work on".

United won a lot of friends with their approach in the Championship last season, but the Premier League is a very different beast.

The average age of Chelsea's starting XI against Sheffield United today is 24 years and 158 days - their youngest ever in a Premier League match.

What do you make of the line-ups? How are you feeling about today's game?

As ever, we'd love to hear from you with your thoughts, theories and rants.

Use #bbcfootball, or text to 81111 (UK only) - and if texting, please include your name.

Simon Brotherton
MOTD commentator

Chelsea face newly-promoted opposition for the second week running, after winning for the first time this season at Norwich last weekend.

Their record at home in the league against teams who've just come up is a predictably good one, with their only such defeat in the last 54 encounters coming against Bournemouth in December 2015.

Sheffield United have made a decent start to life back in the top tier but suffered their first defeat of the campaign last week at home to Leicester. Victory for Chris Wilder's team here would be a major upset and also their first at Stamford Bridge since their inaugural Premier League visit in October 1992, some 27 years ago.

Come back here from 14:50 BST for full text commentary.

Defender Fikayo Tomori makes his first start for Chelsea, his only other Premier League appearance was as a substitute against Leicester on 15 May 2016. He replaces Andreas Christensen, who drops to the bench.

Chelsea XI: Kepa, Zouma, Tomori, Emerson, Azpilicueta, Jorginho, Barkley, Kovacic, Pulisic, Abraham, Mount.

Substitutes: Caballero, Alonso, Christensen, Willian, Batshuayi, Giroud, Gilmour.

Image source, BBC Sport

Oliver McBurnie, Sheffield United's record signing at £20M from Swansea, makes his first Premier League start in the only change for the Blades to the side that lost to Leciester last week. The 23-year-old is in for David McGoldrick.

Sheffield United XI: Henderson, Egan, O'Connell, Basham, Norwood, Baldock, Freeman, Stevens, Lundstram, Robinson, McBurnie.

Substitutes: Moore, Stearman, Mousset, Osborn, Besic, Sharp, McGoldrick

Image source, BBC Sport

Welcome to our coverage of Chelsea v Sheffield United from Stamford Bridge.

Here's today's team news.

Image source, Getty Images