In the second trial match, Chelsea manager Antonio Conte also backed the system after referee Martin Atkinson consulted the VAR on two Chelsea penalty claims.
Swansea felt they should have been awarded a first-half penalty in their 1-1 draw at Newcastle, while Southampton believe they were denied a win at Watford as Abdoulaye Doucoure used his hand to net a 90th-minute equaliser in their 2-2 draw.
“My assistant says it’s a very clear penalty and a red card also, so it’s another decision that creates something important but what can we do? Nothing, only talk about this,” said Swansea boss Carlos Carvalhal.
The draw – and a win for West Brom – left Swansea still at the foot of the Premier League table, four points behind 17th-placed Bournemouth.