Tottenham and England star Dele Alli is the Premier League's most marketable player, according to a SportsPro study.

The 20-year-old has enjoyed a meteoric rise from the third tier of English football all the way to the England national team, for whom he is expected to feature prominently in France this summer.

Alli cost Spurs just £5m in January 2015 but his value in today's transfer market has soared following a superb debut season in the Premier League.

The midfielder has established himself as a key member of Mauricio Pochettino's side and signed an improved five-year contract at White Hart Lane in January.

Alli's form has also led to off-field opportunities and he is in line for an Adidas boot deal worth over £8m, which reflects his standing on SportsPro's list of the world's 50 most marketable athletes 2016.

Dele Alli at 20 13 show all Dele Alli at 20 1/13 Birthday boy As Dele Alli turns 20, we look back at the defining moments of his short career so far... 2/13 Cup shock Alli impressed in the MK Dons' shock 4-0 Capital One Cup victory over Manchester United in August 2014 - a performance the midfielder credits with helping him to get 'noticed' by bigger clubs. 3/13 Star man The youngster had been bought by Tottenham in January 2015 and loaned back to MK Dons for their promotion push, and Alli's 16 goals in 39 appearances contributed to the Dons' successful campaign as they won promotion to the Championship. 4/13 Hot-headed Alli made a quiet start to life at Spurs as a second-half substitute during their 1-0 defeat at Man United on the opening day of the 2015-16 Premier League season back in August, though a booking in his 14-minute cameo hinted at his tempestuous nature. 5/13 Off the mark Alli got the ball rolling early on in his Spurs career with his first top-flight goal in his next game, equalising against Leicester at the King Power Stadium on August 22. 6/13 Derby debut Alli showed his maturity coming from playing cameo roles earlier in the campaign to playing an integral role against Arsenal in the north London derby in November, earning the man of the match award for a composed display ahead of his first full England international call-up. 7/13 Unexpected joy The midfielder had a dream performance against France at Wembley, scoring a wonder strike from 25 yards. Not many people would attempt that kind of effort on their international debut, let alone an England player. 8/13 Natural instinct Alli has gone from strength to strength in front of goal, showing the confidence and desire to interchange with lead striker Harry Kane to break into goal-scoring positions. Fine volleys against West Brom and Everton saw him become one of England's most talked-about youngsters. 2015 Getty Images 9/13 Goal of the season? But Alli arguably saved the best for Selhurst Park in January - his sublime turn-and-volley astonished Crystal Palace supporters, sent social media into meltdown and immediately made him a candidate for goal of the season. 10/13 Berlin comeback Alli was the key man for England as they came back from a 2-0 deficit to beat world champions Germany 3-2 in their own back yard in March. A cheeky nutmeg of Emre Can and an all-round midfield display left Manuel Neuer 'very impressed,' though an open-goal miss at the death proved he is human after all. 11/13 Spurred on Tottenham faced a nervy encounter against Man United on April 10, with anything but a win surely sending the title Leicester's way. Alli struck in the second half to open the floodgates and crush United 3-0 to keep Spurs' title hopes on track, proving that he is developing and can handle pressure at the top level. 2016 Getty Images 12/13 Fiesty On April 25, however, Alli was involved in an altercation with West Brom's Claudio Yacob which saw the England international banned for three games after accepting a violent conduct charge. 13/13 Alli's superb debut Premier League season helped him secure a place in England's Euro 2016 squad. He is expected to play a key part for Roy Hodgson's side in France this summer. 1/13 Birthday boy As Dele Alli turns 20, we look back at the defining moments of his short career so far... 2/13 Cup shock Alli impressed in the MK Dons' shock 4-0 Capital One Cup victory over Manchester United in August 2014 - a performance the midfielder credits with helping him to get 'noticed' by bigger clubs. 3/13 Star man The youngster had been bought by Tottenham in January 2015 and loaned back to MK Dons for their promotion push, and Alli's 16 goals in 39 appearances contributed to the Dons' successful campaign as they won promotion to the Championship. 4/13 Hot-headed Alli made a quiet start to life at Spurs as a second-half substitute during their 1-0 defeat at Man United on the opening day of the 2015-16 Premier League season back in August, though a booking in his 14-minute cameo hinted at his tempestuous nature. 5/13 Off the mark Alli got the ball rolling early on in his Spurs career with his first top-flight goal in his next game, equalising against Leicester at the King Power Stadium on August 22. 6/13 Derby debut Alli showed his maturity coming from playing cameo roles earlier in the campaign to playing an integral role against Arsenal in the north London derby in November, earning the man of the match award for a composed display ahead of his first full England international call-up. 7/13 Unexpected joy The midfielder had a dream performance against France at Wembley, scoring a wonder strike from 25 yards. Not many people would attempt that kind of effort on their international debut, let alone an England player. 8/13 Natural instinct Alli has gone from strength to strength in front of goal, showing the confidence and desire to interchange with lead striker Harry Kane to break into goal-scoring positions. Fine volleys against West Brom and Everton saw him become one of England's most talked-about youngsters. 2015 Getty Images 9/13 Goal of the season? But Alli arguably saved the best for Selhurst Park in January - his sublime turn-and-volley astonished Crystal Palace supporters, sent social media into meltdown and immediately made him a candidate for goal of the season. 10/13 Berlin comeback Alli was the key man for England as they came back from a 2-0 deficit to beat world champions Germany 3-2 in their own back yard in March. A cheeky nutmeg of Emre Can and an all-round midfield display left Manuel Neuer 'very impressed,' though an open-goal miss at the death proved he is human after all. 11/13 Spurred on Tottenham faced a nervy encounter against Man United on April 10, with anything but a win surely sending the title Leicester's way. Alli struck in the second half to open the floodgates and crush United 3-0 to keep Spurs' title hopes on track, proving that he is developing and can handle pressure at the top level. 2016 Getty Images 12/13 Fiesty On April 25, however, Alli was involved in an altercation with West Brom's Claudio Yacob which saw the England international banned for three games after accepting a violent conduct charge. 13/13 Alli's superb debut Premier League season helped him secure a place in England's Euro 2016 squad. He is expected to play a key part for Roy Hodgson's side in France this summer.

The list does not strive to only include athletes who are the highest-paid but instead focuses on those who can offer marketers 'bang for their buck', as well as others who are yet to fulfill their potential, despite boasting huge profiles.

Just seven footballers secured a place on the list, of which Alli is the youngest. The Spurs midfielder is placed at number 45, just 10 positions behind Real Madrid forward Cristiano Ronaldo.

Both Alex Teixeira (30) and Pierre-Emerick Aubameyang (25) feature while Barcelona duo Lionel Messi and Neymar also claim spots at number 27 and eight respectively.

But the leading light in regards to football is Juventus talisman Paul Pogba, who ranks at number two behind Golden State Warriors point guard Stephen Curry.

"The likes of Dele Alli and Paul Pogba - perhaps the next great player of his generation - have the world at their feet and talent in abundance," read a SportsPro statement.

"Not only are their services sought after but, in commercial terms, they are clean slates - an attractive concoction for prospective partners at a time when both players are poised to fulfill their international calling."

A total of 20 sports and 21 nationalities are represented on the list with an an average age of just 24.36.

Britain's highest placed representative arrives in the form of newly crowned heavyweight boxer Anthony Joshua, who will defend his IBF crown for the first time next month.

Scroll through the gallery at the top of the article to see the footballers who feature on SportsPro's list of the world's 50 most marketable athletes 2016: