I'm not entirely sure that he would have caught Kämna.You must appreciate the absolute tactical brilliance of this win. He also had to close Buitrago and Kämna on the descent, the latter unfortunately crashing but Costa was about to reel him back anyway. People are just lazy when they say he "wheelsucked". He was also the first rider that followed Remco in the move that ended up being the break. Just so smart. Incredible rider. What a great win this was.
He is definitely a gambler. I like it.