When Pakistan were previously in England for a Test series, Babar Azam saw a promising start cut short by a bad break.

The batsman made a half-century in the opening game at Lord’s in May 2018, but his involvement in the series was painfully cut short when struck on the left arm by a Ben Stokes short ball.

Forced to retire hurt with 68 to his name, Babar did not appear again during the tour. A fracture ended his contribution as the tourists triumphed at the home of cricket, while he had to watch on as his side were crushed in the second Test at Headingley.

At that stage of his career, Babar was viewed as a limited-overs specialist still making his way in the Test arena. With an average under 25 prior to playing England, he was – at the age of 23 – a player with obvious potential working out how to play the game of patience.

Just over two years on, he returns to England having enhanced his reputation to such an extent that the so-called 'Fab Four' - Virat Kohli, Joe Root, Steve Smith and Kane Williamson - have company. It is unclear who identifies as the cricketing versions of Paul, John, Ringo and George, but Babar is not like the fifth Beatle – his identity is clear.

1996 - Pakistan are looking for their first men's Test series victory on the road against England since 1996; their record stands at D3 L2 since that tour. Wait. #ENGvPAK pic.twitter.com/puhKhzeaUA
— OptaJim (@OptaJim) August 4, 2020

Start a discussion with cricket fans over who should be considered the lead act in the group and you are opening a cricketing can of worms. It is a topic that, understandably, stirs up national pride, but also heated discussions about the weight of importance given to each format.

What is not up for debate, however, is that Babar deserves to be in the conversation. His white-ball numbers are outstanding – he averages over 50 in Twenty20 and one-dayers for Pakistan – yet his Test statistics in recent times provide additional evidence for those keen to argue his case.

Indeed, his average of 75.9 across his 12 Test knocks since the start of 2019 is the best rate of any batsman to have 10 or more innings during that period. Better than Kohli, despite the India captain piling on the runs at home against South Africa, including a career-best 254 not out. Better even than Smith, whose Ashes heroics last year were so crucial in helping Australia retain the urn on English soil.

He also sits above the same pairing when it comes to contributing for his team, providing an astonishing 22 per cent of Pakistan’s total Test runs over the period. There is clearly substance to the style now, a determined streak to go with the eye-catching technique.

Ricky Ponting, the former Australia captain, tipped Babar to become one of the best in the world at the start of the year; he was a little late to get on board a bandwagon that now offers standing room only.

"I think he is right up there already," Azhar Ali, Pakistan's Test skipper, said on the eve of the series opener with England at Old Trafford.

"His performances have improved massively in Test matches over the last year or so. Firstly, he was performing really well in white-ball cricket and people thought he was only a white-ball player, but he took on that challenge and played with a lot of freedom and flair.”

Babar's career totals do not stand up to the sheer volume scored by Kohli, Root, Smith and Williamson - at least not yet. Still, since 2018, he sits above the quartet in terms of Test average (65.5) and strike-rate (63.2 runs per 100 deliveries).

Since the start of 2018, among batsmen who have played at least 15 Tests

Most runs: Joe Root – 2169
Best average: Babar Azam – 65.47

Who will play the bigger role for their team in the #ENGvPAK Tests? pic.twitter.com/4K3N3vIszt
— ICC (@ICC) August 3, 2020

That stretch includes a memorable maiden hundred on home soil. While rain ruined the spectacle of the first Test played in Pakistan for over a decade, Babar brightened up the final day against Sri Lanka in Rawalpindi with an unbeaten 102 that delighted the crowd who had patiently waited to see their team return.

Scores of 60 not out, 100 and 143 followed in the remainder of a truncated series, all from a player who did not reach three figures until his 17th Test.

Prior to that breakthrough innings against New Zealand in November 2018, Babar had managed an unspectacular 822 runs at 30.4. Since then, though, there have been four more three-figure scores in 10 games, plus a 97 in a losing cause against Australia in Adelaide when no colleagues were willing to stick around in support.

Pakistan are likely to lean on him heavily again in England, particularly as they come up against a team brimming with fast-bowling options and fresh off a 2-1 series victory over West Indies.

Babar's development - including a highly productive Cricket World Cup campaign last year on English soil, as well as finishing top run-scorer in the T20 Blast while playing for Somerset - suggests he will relish the challenge.

The head-to-head battle with Root will be one of the main storylines, too. England's captain has much on his plate in the coming weeks, including fathoming out a way to nullify the brilliant Babar, who has stylishly climbed his way into the top tier of international batsmen.