Manchester United's optimism over Anthony Martial's potential was not in doubt - paying £36m for the 19-year-old French striker was evidence enough of that.

But just to ramp up expectations around the deadline-day arrival from Monaco a little more, it's been revealed that one of the many 'add-ons' to the deal includes Martial winning the Fifa Ballon d'Or, the prize for being the best player in Europe.

Should Martial, who two years ago left Lyon for just £4m, achieve everything Manchester United hope he will do, his fee will rise to a whopping £58m.

That would make the teenager the second most expensive signing in British transfer history, just shy of the £59.7m United paid for Angel Di Maria.

Manchester United: Summer 2015 completed transfers Show all 19 1 /19 Manchester United: Summer 2015 completed transfers Manchester United: Summer 2015 completed transfers IN: Memphis Depay (PSV Eindhoven) £31m Depay was the top scorer in the Eredivisie last season with 22 goals. GETTY IMAGES Manchester United: Summer 2015 completed transfers IN: Matteo Darmian (Torino) £12.7m Louis van Gaal signed the specialist full back after employing winger Antonio Valencia at right-back for most of last season. Getty Manchester United: Summer 2015 completed transfers IN: Bastian Schweinsteiger (Bayern Munich) £14.4m Schweinsteiger has won every competition he has competed in for club and country with the exception of the Euros. Getty Images Manchester United: Summer 2015 completed transfers IN: Morgan Schneiderlin (Southampton) £25m Schneiderlin had been at Southampton since 2008, overseeing their relegation to League One and then double promotion from the Championship and then to the Premier League in 2012. Manchester United Manchester United: Summer 2015 completed transfers IN: Sergio Romero (Sampdoria) Free In spite of finding himself second choice at both Sampdoria and Monaco, Romero has been Argentina’s number one for the past five years or so. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Tom Cleverley (Everton) Free Cleverley spent last season on loan at Aston Villa after being frozen out by Van Gaal. Manchester United: Summer 2015 completed transfers OUT: Ben Amos (Bolton Wanderers) Released Amos had been at Old Trafford since 2008 but never in anything more than a back-up role. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Tom Thorpe (Rotherham) Free Thorpe was United’s U21 captain and there was surprise when he didn’t make the grade. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Saidy Janko (Celtic) Undisclosed Janko only started his senior football career last season but has already left his first club. Manchester United: Summer 2015 completed transfers OUT: Nani (Fenerbahce) £4.5m Once considered United’s answer to Cristiano Ronaldo’s departure, Nani leaves Old Trafford for a small fee following younger signings pushing him from the first team squad. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Will Keane (Preston North End) Loan Keane failed to impress on a loan deal at QPR in 2014. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Robin van Persie (Fenerbahce) Undisclosed The man who led United to Premier League glory in his first season with 26 league goals joined Nani at the Turkish side. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Reece James (Wigan) Undisclosed James was part of the United side that lost 4-0 to MK Dons in August 2014. Getty Images Manchester United: Summer 2015 completed transfers OUT: Angelo Henriquez (Dinamo Zagreb) Undisclosed Chile international Henriquez leaves United having failed to establish himself in the first team squad after Van Gaal’s restructuring of the side. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Rafael Da Silva (Lyon) 12.5m The Brazilian defender failed to establish himself under Van Gaal with injuries hampering his opportunities to impress. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Angel Di Maria (PSG) £44m Having arrived in a British transfer record £59.7m deal just last summer, Manchester United allowed the Argentina international to leave after he failed to settle. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Jonny Evans (West Brom) £6m The defender became surplus to requirements at Old Trafford and ended his nine year stay at Old Trafford. GETTY IMAGES Manchester United: Summer 2015 completed transfers OUT: Anders Lindegaard (West Brom) free The Danish goalkeeper made 29 first-team appearances for Manchester United. GETTY IMAGES Manchester United: Summer 2015 completed transfers Tyler Blackett (Celtic) Loan The young defender was sent to Scotland for the season with first-team chances at United likely to be limited Getty