VAR review: While it may seem a soft on-field decision, Emerson stands on the foot of Semedo as the cross comes over, causing the Wolves player to go down and leaving a free header for the attacker.
Once the VAR identifies that Semedo has been stood on, the referee's decision won't be overturned.
Brighton 0-3 Arsenal
Possible penalty overturn: Lamptey challenge on Jesus
What happened: Arsenal were awarded a penalty in the 31st minute when referee John Brooks deemed that Tariq Lamptey had brought down Gabriel Jesus just inside the area. It looked like Lamptey got a slight touch on the ball with the decision checked by the VAR, Robert Jones (watch here).
VAR decision: Penalty stands, scored by Bukayo Saka.
VAR review: Getting a touch on the ball can have a bearing on a penalty incident, and the VAR would have considered this; yet just as important is the context of the situation and the nature of the challenge.
If two players are involved in a 50-50 battle for the ball, and there's contact on the opponent after a touch on the ball it's far less likely the referee, and indeed the VAR, will see an offence -- especially if the contact on the other player is also slight.
However, in this case Jesus had control of the ball and was moving forward into the box. Even though Lamptey did get a small touch on the ball, this wouldn't have prevented Jesus from maintaining possession into the penalty area. Lamptey then makes clear contact on Jesus on the shin with a sweeping motion, and hooks the Arsenal attacker's leg.
Even if this hadn't been awarded on the field it would likely have been a VAR review for a spot kick.
Tottenham Hotspur 3-1 Nottingham Forest
Possible red card: Violent conduct by Maddison on Yates
What happened: James Maddison and Ryan Yates were involved in an altercation just before half-time, with the Nottingham Forest player going to ground holding his stomach. When the ball went out of play, Yates made the VAR signal to referee Simon Hooper three times. Michael Salisbury checked for possible violent conduct and a red card for the Tottenham Hotspur player.
VAR decision: No red card.
VAR review: This is a review for a serious missed incident, as it wasn't seen by any of the on-field officials. It then comes down solely to the VAR's discretion to determine if there's definitive proof.
Maddison took a huge risk, but is there enough evidence to confirm an act of violent conduct? The laws around this were relaxed several years ago to prevent the kind of red card England's David Beckham received against Argentina at the 1998 World Cup -- effectively making a distinction between a petulant act and a violent act.
From the available replays it's not possible to identify a clenched fist from Maddison, while it's difficult to say that the act involved "excessive force or brutality." If there were more conclusive angles available to the VAR it's more likely he'd get involved, but there doesn't seem to be enough to fully justify a red card review.
Yates is also lucky, however, as he was already on a yellow card when he made the VAR sign. This is a yellow-card offence, though only if the player does it excessively. Whether making the signal a few times crosses that threshold for a yellow card would be up to the referee, who chose to give the Forest player a warning instead.
No retrospective action is possible from the Football Association because it was reviewed by the VAR.
Possible red card: Danilo foul on Lo Celso
What happened: Danilo made a clearance in the 78th minute, and caught Giovani Lo Celso around the knee area with his follow-through. The referee showed a yellow card, with the decision checked by the VAR.
VAR decision: No red card.
VAR review: This is about judging how a player has gone into the challenge as well as the force involved. That Danilo is clearing the ball, rather than attempting to challenge an opponent, makes a difference -- and we have an example of an incorrect VAR intervention from a previous season in similar circumstances.
West Ham's Fabián Balbuena cleared the ball, with his foot landing on the leg of Chelsea's Ben Chilwell. After a VAR review Balbuena was shown a red card, a decision which the Hammers got overturned on appeal.
Everton 1-0 Burnley
Possible red card overturn: O'Shea foul on McNeil
What happened: Dara O'Shea was sent off in the 67th minute after he brought down Dwight McNeil. The Everton midfielder had pounced on poor control from O'Shea to get a foot on the ball. Referee Michael Oliver deemed that McNeil would have been through on goal, and produced a straight red card for denying an obvious goal-scoring opportunity (DOGSO).
VAR decision: Red card stands.
VAR review: This was a questionable red-card decision, and the frustration of Burnley boss Vincent Kompany is understandable.
While McNeil wins the ball and pushes it forward towards goal, it goes a long way in front of him and there has to be clear doubt that he would be able to get onto the ball before goalkeeper Aro Muric -- therefore this shouldn't be considered as a DOGSO offence.
David Coote, on VAR, should have told Oliver to review it to downgrade to a yellow, and it's very likely there will be an appeal against the red card.
Possible penalty or red card: Berge challenge on Beto
What happened: Beto raced through on goal in the 87th minute before going to ground under a challenge from Sander Berge. Referee Oliver wasn't interested in claims for a foul.
VAR decision: No penalty or red card.
VAR review: While there is a case for a foul by Berge, the contact on Beto is inside the D rather than in the box, so there can be no penalty.
As the possible foul is outside the area, that opens up a case for a DOGSO red card. Luckily for Berge, Beto takes a heavy touch which brings Muric into play and means there probably wasn't an obvious goal-scoring chance, so the VAR cannot get involved.
Possible penalty: Rodriguez challenge on Garner
What happened: James Garner had the ball just inside the area in the third minute of added time and looked to move the ball to right. Jay Rodríguez made a challenge and made some contact with Garner, but referee Oliver waved away the penalty claim.
VAR decision: No penalty.
VAR review: Much like Dominic Calvert-Lewin's penalty appeal against Bournemouth last weekend, there wasn't enough contact by Rodriguez for the VAR to judge that Garner has been brought down.
The Independent Panel ruled that 4-1 that the challenge on Calvert-Lewin wasn't a penalty.
Sheffield United 2-2 Chelsea
Possible red card: Robinson challenge on Palmer
What happened: Jack Robinson was booked by referee Robert Jones in the 58th minute after a bad challenge on Cole Palmer. The VAR, Paul Tierney, checked for a possible red card.
VAR decision: No red card.
VAR review: There have been four missed red cards for serious foul play in the Premier League this season, and there's a chance this will be a fifth. Robinson goes into the challenge with force and catches Palmer around the calf area.
That Palmer didn't have his leg planted probably saved him from injury, and gave the impression that a yellow card would be an acceptable disciplinary outcome -- but this is right on the borderline.
Casemiro made a similar challenge on Luis Díaz in the final minute of Manchester United's game against Liverpool. The Brazilian was shown a yellow for that tackle, and the low point of contact saved him from a possible red card -- a yellow card may be seen as acceptable in this case but there's an argument that he was off the ground and out of control.
Crystal Palace 2-4 Manchester City
Possible penalty: Gvardiol challenge on Eze
What happened: Eberechi Eze looked to collect the ball inside the area in the 45th minute, but went to ground under a challenge from Josko Gvardiol. Referee Paul Tierney ignored the claims for a spot kick with the decision checked by the VAR, Stuart Attwell.
VAR decision: No penalty.
VAR review: Gvardiol is clumsy in the way he challenges Eze, but with Tierney having a clear view of the incident it's not going to be given as a penalty on VAR review.
Fulham 0-1 Newcastle
Possible foul: Burn on Bassey before Schär goal
What happened: Newcastle United took the lead in the 75th minute from a corner routine, with Fabian Schär firing home at the back post after the ball had evaded everyone in the centre of the box. However, the VAR initiated a review for a possible foul by Dan Burn on Calvin Bassey.
VAR decision: Goal disallowed.
VAR review: After Anthony Gordon's goal for Newcastle against Arsenal was allowed to stand despite Joelinton having his hands on the back of Gabriel, Gunners fans might ask what the difference is for the VAR to get involved at Craven Cottage.
These situations are always going to be subjective, and rely on the opinion of the VAR for each individual game and what their threshold for a foul is.
Jarred Gillett as VAR has deemed that by leading with his arms into the neck of Bassey, Burn has prevented the Fulham player from being able to challenge for the ball. It's a strong enough challenge for the VAR intervention to be warranted, but there will doubtless be other incidents that appear similar which don't lead to the goal being disallowed.
Aston Villa 3-3 Brentford
Possible penalty: Jorgensen challenge on Carlos
What happened: The game was in the 34th minute when Aston Villa had a corner. As the ball was delivered into the area, Diego Carlos went to ground in a tussle with Mathias Jorgensen. Referee Michael Salisbury gave a free kick to Brentford, but Villa wanted a penalty.
VAR decision: No penalty.
VAR review: This could easily have been a spot kick, and it certainly wasn't a foul by Carlos -- though the VAR will only get involved if they think a penalty incident has been missed, rather than a free kick being wrongly awarded.
The VAR, Chris Kavanagh, has deemed that Carlos was leaning into Jorgensen before the Aston Villa player went to ground. That's probably just about an acceptable interpretation of events, but Jorgensen was fortunate.
Some parts of this article include information provided by the Premier League and PGMOL.