The Chilean has similarities to Carlos Tevez, a key man in the 2007-08 side, and may give José Mourinho’s attack an edge

In Alexis Sánchez, José Mourinho is about to acquire another world‑class player as he plots to make Manchester United an elite domestic and European force again. Manchester City hold a 12-point advantage over Mourinho’s team so a credible title challenge will have to wait until next season. Yet Sánchez’s arrival can help to propel United to a strong finish and light up the Champions League campaign that they will resume next month with a last-16 tie against Sevilla.

This is why Mourinho was hired: to make United England’s dominant side once more and return them to the rank of continental heavyweights. To achieve this the XI must be decorated with footballers who can consistently turn matches. Sánchez’s arrival – his switch from Arsenal to United is expected to be completed by Tuesday – completes a triumvirate of these, as he joins David de Gea, a near-peerless goalkeeper, and Paul Pogba, one of the game’s pre-eminent midfielders. Sánchez’s preferred starting position may be on the left but, as he will be United’s focal point, the Chilean’s arrival will mean the team have a formidable spine.

This is certainly the thinking behind the deal for a 29-year-old whose contract expires in July. Theory does not always translate into practice, of course.

How Mourinho harnesses Sánchez within the side is imperative, as is the way he integrates the forward into a squad the Portuguese describes as his happiest.

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Those who pigeonhole Mourinho as a park-the-bus advocate will wonder how he will deploy Sánchez. The analysis may run that the player’s penchant for aiming at the opposition’s jugular will be shackled by a managerial directive to track back and so reduce Sánchez to a factotum in thrall to “team ethic”.

Mourinho’s answer might be to point at how his glittering career has been built on an ability to transform playing resources into trophy‑winning units. The League Cup and Europa League triumphs of last season were achieved with a functional team that had a 35‑year‑old, Zlatan Ibrahimovic, as its spearhead, until the Swede’s injury in April.

Yet when able to call on those with an X-factor Mourinho allows them to flourish: his finest sides have featured players of verve and pace who expressed themselves. Think Arjen Robben of his double Premier League winners Chelsea (2004-05 and 2005-06) and Cristiano Ronaldo of Real Madrid’s record‑breaking 2011-12 La Liga champions. So it would be a surprise if the manager’s intent were not for Sánchez to enhance United in similar fashion.

Mourinho’s opening season at United featured complaints at the lack of firepower in support of Ibrahimovic, who scored 27 times. While Anthony Martial was returning eight goals in 41 appearances, Marcus Rashford 11 in 52, Juan Mata 10 in 42 and Jesse Lingard five in 40, Sánchez was bagging 30 in 51 games for Arsenal.

Facebook Twitter Pinterest Alexis Sánchez in action for Arsenal against Manchester United in December. He is close to a move to the Old Trafford club. Photograph: Adrian Dennis/AFP/Getty Images

With Romelu Lukaku proving as prolific this year as Ibrahimovic was last – the Belgian has 16 in 31 – if Sánchez can contribute more personal goal gluts, United will hope to challenge the division’s most prolific scorers, City and Liverpool. The leaders have 70 and the Merseyside club 54, with United’s total the third-highest at 49. Sánchez’s numbers offer further encouragement. The 2014‑15 campaign, the first after his £30m move from Barcelona, ended with 25 goals in 51 appearances, before 17 in 41 in 2015-16.

Sánchez’s ability to convert speed and directness into a creative end-product is also required. Rashford and Martial are pacy but blunder up too many blind alleys. The manager’s fragile trust in them is signalled by their continual rotation. Sánchez makes better choices and rarely has an off-day.

His is a kind of restless reliability that casts him in the mould of Carlos Tevez, a key member of arguably United’s finest side of the Premier League era: the 2007-08 vintage that defended the title and won the Champions League. Tevez offered United an edge and, though Sánchez is not as feisty, he is as relentless as his fellow South American.

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There remains a question over United’s No 10 berth, and Mourinho may try Sánchez in a position for which he deemed Henrikh Mkhitaryan not good enough. Lingard’s run of nine goals in 12 appearances has come, in the main, when operating in this role, so he could prove the long-term solution.

If there is no doubt, then, that Sánchez the footballer is a stellar asset, what of Sánchez the team‑mate? In the weeks before he left Arsenal, his desire to do so caused unrest, with his goal against Crystal Palace in late December not celebrated by all of the side.

A willingness to jump from Manchester City, who pursued him for nearly a year, to United at the last minute may also provoke accusations of being a mercenary. The charge would be that Sánchez is more interested in the reported £500,000-plus a week earned at United than in being the more modestly remunerated Premier League champion (and who knows what else) he almost certainly would have become at City.

Mourinho, however, is no jam-tomorrow coach. He is an arch‑pragmatist intent on fielding XIs that should be winning machines. He is at a club about to go half a decade since their last domestic crown. On this basis Mourinho will do all to ensure Sánchez buys into the spirit he speaks of and a squad desperate to end the title drought will surely welcome him, too.