Harry Kane had a unique approach to penalty practice early in his career, a former manager of his has revealed.The Ballon d’Or winner has built a reputation with his clinical spot-kicks for club and country.Kane missed his second penalty of the season against Borussia DortmundGettyHowever, Kane’s trademark precision deserted him during Bayern Munich’s 2-2 draw with Borussia Dortmund on Saturday night.The England captain struck the crossbar from 12 yards, missing the chance to double his side’s lead.Bayern would go on to be pegged back twice as they were held at the Allianz Arena.It is already his second miss of the season having hit the woodwork for the Three Lions against Spain in September.Kane’s penalty practice routineKane’s former Leyton Orient boss Russell Slade has now lifted the lid on the player’s penalty routine at the start of his senior career.The 66-year-old signed a 17-year-old Kane on loan from Tottenham Hotspur back in January 2011.He went on to score five goals in 18 appearances during his five-month stay at Brisbane Road, having been handed his professional debut by Slade.None of those strikes were from 12 yards, though, despite Kane often practicing his spot-kicks after training, Slade has revealed.Speaking to Shaun Custis and Henry Winter on Sunday Edition, he recalled: “He would spend 20 minutes, half an hour, just practicing the run up and exactly where he was placing the ball, time after time.“I actually remember asking him one day, ‘do you need a keeper?’ He said, ‘no, thank you, it’s ok.’ It was just about his run up and where he was going to plant the ball.”Slade has revealed Kane would practice penalties without a goalkeeperGettySlade was also asked if he could see Kane’s character straight away when he joined Orient.He added: “Yes, absolutely. Very calm kid. Very dedicated boy. Would ask maybe the odd question.“I think it was important that senior players, he quickly got a relationship with them and he wanted knowledge.“He had a thirst for that knowledge and understanding of the game at a very early age.”The 33-year-old had scored two penalties since the miss against Spain before his wayward effort on Saturday.It marks the 16th time in his career he has failed to score a penalty during a competitive match.Kane scored five goals in 18 appearances during a loan spell at Orient aged 17GettyKane has scored 113 penalties from his 129 attempts. The most recent of those converted efforts came against Arsenal in the Champions League last month.