Thereafter, Son's career began recording progress in leaps and bounds especially after Hamburger SV gave him his first professional contract on the day of his birthday in July 2010.
ຫຼັງຈາກນັ້ນ, ອາຊີບຂອງ Son ໄດ້ເລີ່ມຕົ້ນບັນທຶກຄວາມກ້າວ ຫນ້າ ໃນຈັງຫວະແລະຂອບເຂດໂດຍສະເພາະຫຼັງຈາກ Hamburger SV ໄດ້ໃຫ້ສັນຍາມືອາຊີບລາວຄັ້ງ ທໍາ ອິດໃນມື້ວັນເກີດຂອງລາວໃນເດືອນກໍລະກົດປີ 2010.