The Chile international was instrumental in keeping Swansea competitive at The Den, making a series of outstanding saves as the visitors battled to earn what looked like a hard-fought point, only for Caleb Taylor’s 92nd-minute header to snatch victory for the hosts.
Vigouroux cut a dejected figure at full-time, hands on head, after his efforts ultimately went unrewarded.
Matos made it clear the result did little to diminish his admiration for his number one.
“I think not only [against Millwall], he has been outstanding,” said Swansea’s head coach.
“Defending, also attacking with the ball. [Vigouroux's performance at Millwall] was massive because it kept us in the game - we could compete.
“He made some really unbelievable saves and we were not fortunate enough to give him at least one point. I think he deserved it.”
READ MORE: Vitor Matos Era Taking Effect as Swansea City go as Close to Play-offs as to Drop Zone
The display was the latest in a long line of assured performances from Vigouroux, who has been Swansea’s first-choice goalkeeper for the past season and a half.
Matos highlighted not just his shot-stopping but his influence across all aspects of the game.
“Vigs has been fantastic, not only today but in the other games as well, not only defending the goal but with the ball,” he said.
“Attacking-wise, today he was massive again as he allowed us to compete.
“Unfortunately, we could not give him at least one point that he deserved because he was absolutely fantastic.”
READ MORE: You 'Aint Seen Nothin' Yet . . . Swansea City Hit Man Zan Vipotnik Tipped for Higher Things
Matos also spoke warmly about Vigouroux’s character and importance within the squad.
“He is an experienced goalkeeper, a top character, top professional,” he added.
“I like him a lot and the boys like him a lot. We are really happy to have him.”
While Vigouroux shone, Matos acknowledged Swansea had struggled to impose themselves early on, particularly under Millwall’s intensity in the opening period.
“First half, Millwall came really intense, really aggressive and we didn’t have the consistency with the ball that we want to have,” he said.
“At the same time, we were deeper, deeper and deeper so that gave Millwall the opportunity to create chances.”
READ MORE: Swansea City Boss Admits Moral Victories are no use Whatsoever
Millwall eventually broke through after 38 minutes when Mihailo Ivanovic turned inside the box and finished past Vigouroux, who had already denied the Lions on several occasions.
Swansea responded well after the interval, levelling just two minutes into the second half through Ben Cabango.
Matos was encouraged by his side’s response following the break.
“Then in the second half we became much more aggressive, much more in control, much more dominant, got into much better positions, and I think that’s what we want and what we need to find in terms of consistency,” he said.
“It’s not easy with the amount of games, but that’s what we need to take out of the game.”
Just as Swansea looked set to leave south London with a point that Vigouroux’s performance arguably merited, Millwall found a way.
Alfie Doughty delivered a superb cross and Taylor rose highest at the back post to head home in stoppage time.
Millwall head coach Alex Neil admitted there were moments when it felt like it might not be their night, largely due to Vigouroux’s heroics.
“There was a chance right before I took Femi [Azeez] off that the goalkeeper claws one away from behind him, and you’re thinking ‘is this our day?’” Neil said.
“And then Alfie [Doughty] produces an unbelievable cross and Caleb gets up at the back stick, above his man, and I thought it was no more than we deserved.”
Neil praised his side’s resolve as the late goal lifted Millwall back into the Championship play-off places.
“We know we can certainly play better than we did in the second half but I think that’s a true test of a team,” he said.
“Have you got enough bottle, enough drive and enough grit to get that next goal that matters?
“The fact is we’re at this stage of the season where you get your points and you stay with the pack right to the end or you start to drift – I think the league is that tight just now.”
