By Samuel Meade Borussia Dortmund’s sporting director Sebastien Kehl claims Jadon Sancho is “more mature” and – despite criticism of his time keeping – has been deemed “over-punctual”. The winger finally managed to end his difficult period at Manchester United, which saw him frozen out of the first-team after publicly criticising manager Erik ten Hag. The Dutchman cited a need to raise standards in Manchester with Sancho becoming renowned for his lateness. The England international failed to justify his £73million fee while at Old Trafford despite being a roaring success during his time playin…