Southampton have announced the signing of Ben Brereton Diaz from Villarreal for a reported fee of £7million. 

Brereton Diaz, who featured in all three of Chile's Copa America fixtures last month, has signed a four-year contract at St. Mary's. 

The 25-year-old ends a torrid spell with Villarreal, having failed to score in his first 20 appearances following his move from Blackburn Rovers on a free transfer last year.

Brereton Diaz spent the second half of last season on loan with Sheffield United, scoring six goals in his 14 Premier League outings. 

During his time at Bramall Lane, he accumulated the second-highest expected goals (xG) within the Blades' squad (6.07), a total only bettered by Oli McBurnie (6.89) who played in seven more games and scored the same number of goals. 

Southampton were on the hunt for attacking reinforcements following the departure of Che Adams to Torino last week, with the Scotland international leaving the club having scored 48 goals and adding 20 assists in 191 appearances for the Saints. 

“I’m absolutely buzzing. It’s been smooth these past couple of days, and I’m happy to get everything sorted and signed. I’m really excited to meet everyone, it’s great to be involved with this great club," Brereton Diaz said. 

“Watching the club when I was younger, it was always in the Premier League. Obviously last season, the way the team played, they went down but they bounced straight back up as a team.

"Also the gaffer as well – everything has aligned together, and I think it’s an amazing club. I can’t wait to get started.”

Brereton Diaz becomes Russell Martin's eighth arrival this transfer window following the signings of Adam Lallana, Taylor Harwood-Bellis, Charlie Taylor, Ronnie Edwards, Nathan Wood, Yukinari Sugawara and Flynn Downes.

Sheffield United boss Chris Wilder could not hide his disappointment after his side let slip a two-goal lead to draw 3-3 against Fulham at Bramall Lane.

The Blades led 3-1 with four minutes of regulation time remaining after Ben Brereton Diaz’s second-half double sandwiched Oli McBurnie’s effort.

Joao Palhinha had headed Fulham level after Brereton Diaz’s opener, while two stunning finishes from substitute Bobby De Cordova-Reid and Rodrigo Muniz – the latter’s in stoppage time – rescued the Londoners a point.

Wilder, whose side had conceded 21 goals in their four previous home matches, said: “When you score three goals at home in the Premier League, to only get a draw, I think that’s the disappointing aspect of it.

“Obviously the narrative from everybody was home form, goals conceded and being out of the game after 25 minutes, so we had to make sure we did something about it.

“We had to get a foothold in the game, so first base was reached at half-time and the message at half-time was we just needed to show a bit more quality, more belief, enjoy the ball a little bit more, and they did.

“We scored three good goals from our point of view. The flip side is another set-piece has hurt us and then two incredible finishes get them something out of the game.”

Brereton Diaz and McBurnie, who had a second effort after the interval ruled out for offside, combined with deadly precision for the Blades’ first two goals.

Wilder added: “I’m sure if we had been able to stick those two together for a little bit more time we would have reaped the rewards of two really good players, who obviously have an understanding.”

Fulham head coach Marco Silva also admitted it had been a bitter-sweet afternoon for his side after they had dominated before Brereton Diaz’s 58th-minute opener.

Silva said: “I have to say it was an exciting game for sure for the people who were here, but I have to be honest, it was a disappointing result for us. Clearly disappointing.

“When you are dominant from the first minute like we were, the team who created more clear chances to win the game – it is disappointing.

“Of course the reaction, I have to say, as a team it was fantastic. As a team we refused to lose this game because of the way we dominated.

“We showed the quality to come back from 3-1, scoring two great goals and creating more chances even to win the game in the last minutes.”

Muniz struck the woodwork twice, either side of the interval, before Fulham fell behind and the Brazilian striker has now scored eight in as many top-flight appearances.

Silva added: “It was unlucky for him with two off the post, but he kept his composure and trusted in himself.

“He scored a great goal to help the team get a point and there’s much more to come from him.”

Rodrigo Muniz’s superb stoppage-time equaliser denied Sheffield United a rare Premier League win in a six-goal thriller against Fulham at Bramall Lane.

Brazilian striker Muniz volleyed home in the third minute of added time to make it 3-3 and cap a pulsating second half which followed a tame and goalless first period.

Ben Brereton Diaz put the Blades in front and after Joao Palhinha had headed Fulham level, the Chile striker set up Oli McBurnie for the home side’s second before heading the Blades into a 3-1 lead.

But substitute Bobby Cordova-Reid reduced the deficit for Fulham with his first touch in the 86th minute and Muniz acrobatically silenced the home fans with his eighth goal in as many top-flight appearances.

The Blades, who had shipped the most goals in Premier League history after 28 matches, defended doggedly to ensure the first 45 minutes ended 0-0.

They became the first English League club to concede at least five goals in four consecutive home games in all competitions when losing 6-0 to Arsenal earlier this month.

Muniz went close to breaking the deadlock for Fulham when his sliding 38th-minute effort was pushed on to a post by Blades goalkeeper Ivo Grbic.

The Brazilian hit the woodwork again at the start of the second period as his towering header from Andreas Pereira’s deep cross bounced off the far post.

The Blades then scored the opening goal out of nowhere. Ben Osborn set McBurnie free down the left and the latter’s superb ball in across the face of goal was swept home by Brereton Diaz in the 58th minute.

The Blades’ lead lasted only four minutes as the unmarked Palhinha’s looping header from Pereira’s near-post corner drew Fulham level.

But the Blades then struck twice in as many minutes to open up a two-goal lead.

Brereton Diaz laid one on a plate for McBurnie to side-foot home from close range and the Bramall Lane roof was raised when the Chile striker headed home Gustavo Hamer’s curling cross at the far post.

A confusing VAR check immediately after the goal ruled Fulham goalkeeper Bernd Leno had not struck Brereton Diaz after the striker had fallen over the goal-line.

It appeared to get even better for the Blades before VAR ruled out McBurnie’s effort after Fulham had failed to clear their area as Vini Souza was ruled offside.

The Cottagers then set up a grandstand finish after Cordova-Reid fired home a low shot from the edge of the box after replacing Pereira with four minutes left.

And in the third of 14 minutes of stoppage time, Muniz launched himself at Adama Traore’s cross to smash home Fulham’s equaliser.

Oli McBurnie’s penalty in the 13th minute of time added on snatched Sheffield United a 2-2 draw against West Ham in a dramatic ending at Bramall Lane.

The Hammers looked to have won it when James Ward-Prowse’s 79th-minute spot-kick put them ahead after Maxwell Cornet’s first goal for the club was cancelled out by a debut effort from new Blades recruit Ben Brereton Diaz.

But referee Michael Salisbury ruled West Ham goalkeeper Alphonse Areola had fouled McBurnie in the eighth minute of stoppage time and a further five minutes later, with Areola replaced by Lukasz Fabianski, the Blades striker coolly struck home from 12 yards to earn a point.

Hammers boss David Moyes was raging at the decision as his side dropped two points which would have seen them close the gap on the Premier League’s top four.

It was the culmination of an action-packed end to the game, with Rhian Brewster sent off for Sheffield United and Vladimir Coufal following for West Ham in separate incidents.

A point was celebrated vociferously but Sheffield United need wins as they remain seven points adrift at the foot of the table and no team in Premier League history has survived with so few points at this stage of a season.

Chris Wilder’s men started with bluster but failed to trouble the West Ham goal and the visitors soon began to find holes at the other end.

The Hammers went ahead with their next meaningful attack in the 28th minute.

Ings fed Coufal on the right and then got the ball back when he found a pocket of space on the edge of the area. His shot was blocked by Jack Robinson but it fell perfectly for Cornet to slash home at the far post.

It was a moment to remember for the Ivorian, who finally broke his duck at the 31st attempt.

The Hammers smelled blood and were only denied a second by a brave block from Jayden Bogle to deny Ings.

That proved important as Brereton Diaz got his first Premier League goal to pull the hosts level in the 44th minute.

Aaron Trusty’s hopeful header into the box found Will Osula at the far post and his diving header was palmed away by Areola, straight into the path of the Chile striker, who thrashed home from six yards.

He should have been celebrating a second 12 minutes after the restart but produced a bad miss at a golden moment.

James McAtee set him clear and as he closed in on goal with no one else around him he seemed destined to score, but dragged his shot wastefully wide.

There was a sense that that could be pivotal and so it proved as the visitors were awarded a penalty with 11 minutes of normal time remaining when Gus Hamer tripped Ings.

Ward-Prowse was never going to do anything other than ripple the back of the net as he sent his effort straight down the middle.

The hosts’ chances of getting back into the game appeared to be severely hampered in time added on as Brewster was shown a red card for a tackle on Emerson Palmieri after a VAR check.

But that was just the start of the drama as Coufal picked up his second yellow card in less than four minutes and the foul led to the Blades being awarded a penalty.

They recycled the set-piece, with McAtee curling in an inviting cross which Areola came for but did not get to, instead clattering into McBurnie.

The referee pointed to the spot and after a long delay where Areola went off injured, McBurnie scored from the spot.

Burnley ended their wait for a Premier League home win in style with a 5-0 rout of fellow strugglers Sheffield United, climbing off the foot of the table and piling pressure on Blades boss Paul Heckingbottom.

Jay Rodriguez needed just 15 seconds to head Vincent Kompany’s side in front and Jacob Bruun Larsen doubled the lead in the 28th minute, with United ending the first half a man down after Oli McBurnie collected two petulant yellow cards in quick succession.

More pain followed for United in the second half as Zeki Amdouni and Luca Koleosho scored two in the space of three minutes before Josh Brownhill added a fifth, giving Burnley their biggest ever Premier League win.

No English league club had ever opened a season with eight home defeats and Burnley could not afford to set that record against a United side who began the day one point better off, with these two starting the day first and second in terms of the worst starts to a Premier League season by promoted sides.

Both Burnley’s wins to date have come against teams promoted alongside them in the summer, but after encouraging displays against Crystal Palace and West Ham, three points offer tangible reward for improving performances.

For United it was another chastening day, the pain of defeat increased by the loss of McBurnie to a needless suspension. There was no sign of the sort of quality that will be needed to get them out of trouble.

Burnley scored the opener with a move straight from kick-off. James Trafford punted the ball forward, Amdouni shifted it to the left and Charlie Taylor whipped in a first-time cross for Rodriguez to head home.

It was the quickest Premier League goal of the season, and made Rodriguez the first player in the league’s history to score in the opening 15 seconds of two separate games, 10 years and one day after he pounced for Southampton against Chelsea.

Burnley doubled their lead when Bruun Larsen got in front of Luke Thomas to reach Dara O’Shea’s long ball, cutting in off the right before passing the ball under the despairing dive of Wes Foderingham.

United’s frustrations soon surfaced. McBurnie, back in the starting 11 after scoring the late consolation in last week’s home defeat to Bournemouth, was lucky to only see yellow for catching O’Shea with an elbow in the 36th minute, leaving Kompany livid on the sideline.

Moments later O’Shea caught McBurnie, who delivered enough theatrics to ensure his counterpart also saw yellow, and Kompany joined both players in the book for his remonstrations.

More was to follow and when McBurnie caught O’Shea with an arm once again in first-half stoppage time, he earned a second yellow card and a head start on the trudge to the dressing room.

Heckingbottom, already forced into one substitution due to an injury for George Baldock, made a triple change at the break as Benie Traore, James McAtee and William Osula came on for Thomas, John Fleck and Cameron Archer.

It meant only half United’s outfield players that started the match were still on for the start of the second half. But it did little to change United’s fortunes and the floodgates opened after the 73rd minute.

Burnley’s third came when United failed to clear a corner and Jordan Beyer headed the ball down for Amdouni to spring between Jack Robinson and Anel Ahmedhodzic before playing the ball beyond Foderingham.

Moments later Koleosho cracked a shot off the crossbar when Foderingham could only parry Amdouni’s shot, but the teenager was soon celebrating his first Premier League goal as he shrugged off a challenge and beat the goalkeeper at his near post.

Brownhill rifled in the fifth from the edge of the box with 10 minutes to go.