The 16-time Oranje defender previously trained the 23-year-old, and was delighted to see the left-back star in his Old Trafford debut against Wigan last weekend

By Jesse Wieten Alexander Buttner has all the credentials to become a star at Manchester United , according to former Netherlands international Peter Boeve.The 23-year-old enjoyed a dream Old Trafford debut, scoring one and setting up another in last weekend’s 4-0 win over Wigan.Former Ajax and Netherlands defender Boeve gave Buttner individual training sessions while the youngster was playing for Vitesse Arnhem, and believes the defender has already silenced some doubters.“Many people were laughing about his transfer,” he told“They couldn't believe it. Apparently not everyone has the insight to recognise talent.“It’s lovely that he started like this at his new club. But he's not there yet. It's easy to come somewhere, but it's hard to stay there. He must be mentally strong and keep both feet on the ground.“He must work very hard and look at the other experienced players. He can learn a lot from them. He'll also become a better play by training with better players."Buttner has played for the Netherlands at Under-20 and Under-21 level but has yet to receive a senior cap. Boeve believes, however, that it is only a matter of time before he becomes an Oranje regular and establishes himself as the first choice left-back for Sir Alex Ferguson."Buttner can improve a lot. I think he's a better left-back than Jetro Willems [of PSV]. Alex deserves a selection for the Oranje,” he added."Alexander is still the rough street football player. Sometimes a bit uncontrollably, but you can unlearn that. But on the other hand, that playful style is also a good thing.“He must improve his good points. Buttner has insight, a good pass is strong offensively, but defensively less. He can cover the whole left side, but must choose his moments.“The fact that Buttner played against Wigan proves that Ferguson see him as a serious option. Evra is getting older, Buttner is there for the long term. What term? He can decide himself."