As Philippe Coutinho departed from the pitch on a warm afternoon in east London, his 89th‑minute substitution met by raucous applause by those who filled the away end, he was embraced by Jürgen Klopp. Nothing surprising there given the frequency with which the Liverpool manger hugs his players but this one felt a little different: tighter, longer, stronger. A thank you in physical form and, perhaps even, the warmest of pleas to the Brazilian to stay exactly where he is.

In the past week Coutinho has yet again been linked with a move to Barcelona, despite having signed a new five-year contract with Liverpool in January, with the city’s leading daily newspaper Sport running a front page headline on Tuesday that suggested in unequivocal terms that the player has agreed a €90m move to the Camp Nou in the summer. Liverpool immediately insisted he is not for sale but the rumours refuse to die and will have only grown on the back of how the 24-year-old performed against West Ham United. He was yet again brilliant and the hope for Klopp and everyone at Anfield must be that, having contributed greatly to the club in all but securing a return to the Champions League, Coutinho will deem his immediate future does indeed lie on Merseyside.

Philippe Coutinho strengthens Liverpool’s grip on top four at West Ham Read more

The midfielder certainly looked content on an afternoon in which he scored two goals, set up another and generally dazzled with a combination of masterful technique, stunning vision and ruthless finishing. Those in claret and blue simply could not tame him and if there was one image which summed up the torment it was probably that of James Collins standing flat-footed and looking utterly clueless as Coutinho cut inside him before lashing the ball past Adrián to make it 3-0 to Liverpool on 61 minutes. Watching on, Slaven Bilic must have felt tempted to reach for the nearest white towel and throw it on the pitch.

It would be wrong to suggest Coutinho was the only one who shone for Liverpool in a 4-0 victory that leaves them requiring just one more win, against Middlesbrough on Sunday, to guarantee a top-four finish. Theirs was a collective pummelling, with Daniel Sturridge, Adam Lallana and Georginio Wijnaldum among those in the visitors’ ranks who also caught the eye. But the star turn was yet again Coutinho and what was particularly intriguing about the No10’s contribution was that it came from a No8 position.

This season Coutinho has most often lined up on the left of Liverpool’s three-man attack. Here, though, he was positioned on the left of a diamond midfield as Klopp reverted to a conventional two‑man attack consisting of Sturridge and Divock Origi, who completed the scoring on Sunday on 76 minutes. Klopp had hinted at the tactical switch on the eve of this match, suggesting Coutinho could have “more influence” on proceedings from a deeper position and having made the change, the German watched on with delight as ‘O Magico’ lit up the London Stadium.

Marked less tightly and with space, Coutinho made his presence felt from the outset and it was his delicious defence-splitting pass on 35 minutes that opened the scoring for Liverpool. Nathaniel Clyne appeared the obvious target as Coutinho collected possession by the halfway line but instead of going right he set Sturridge free with a perfectly weighted delivery through the middle that the striker duly converted for his first goal since 2 January.

From there the Brazilian continued to menace a West Ham team who, it should be said, defended appallingly, and on 57 minutes he scored his first of the afternoon, gliding past Havard Nordtveit and Winston Reid in quick succession before drilling a right‑footed shot into the far corner. Coutinho’s second four minutes later came via a breakaway that he led on the halfway line and took the Brazilian’s tally to 12 in the Premier League for the season which, allied to his seven assists, makes this his most productive campaign since he arrived from Internazionale in January 2013.

Play Video 1:02 'A perfect afternoon' for Jürgen Klopp and Liverpool – video

“It was obvious Phil can play this,” Klopp said when asked about Coutinho’s performance from a deeper position. “If he starts on the wing he’s very often in this position – he’s always a playmaker and it’s not interesting where he’s coming from; he needs to be in the decisive area, shooting and finishing situations.”

Seasoned Liverpool watchers will already have been aware of the damage Coutinho can cause from a midfield role given that is where he mainly performed during the 2013-14 season, excelling as Brendan Rodgers’s men came close to winning the title. As Klopp states, it is a base from which he can move into different areas and what is so mesmeric about watching the Brazilian perform is how he can do something by doing nothing, dropping a shoulder and standing still, forcing defenders off balance before gliding past them with the ease of a cyclist peddling down a ramp. He is a captivating talent who Liverpool must keep if they are to progress domestically and, almost certainly now, make their mark in the Champions League next season. Barcelona’s advances will remain strong but the message from Anfield needs to be straightforward: our main man is going nowhere.