Sead Kolasinac is always looking to improve himself on the pitch. The Bosnia & Herzegovina international has studied a whole host of players in his position ever since he started playing football as a young boy.   So who are the five left backs that he's modelled his game on?   "My No 1 is Roberto Carlos," Kolasinac said. "He was a dangerous left back and he played forward a lot too. He was probably the first left back who really stood out for me and has stuck in my mind.   "He started everyone shooting with the outside of boot. It's a strength that nobody has been able to re-create, except maybe Quaresma, but it's definitely something really special.   "After...
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