From the very first day, may I add.
If memory isn't betraying me, when we bought him from Udinese he was a midfielder. Having Pirlo, Marchisio and Vidal, as well as an upcoming Pogba in the squad, Asamoah had to accept a completely new position for him on the pitch, as a left back. Not only he didn't complain, but he ended up as the best rated fullback in serie A for two straight seasons and in the record 102 pts season he played more minutes than anyone else in Juve bar Buffon, Chiellini and Pogba. Then the terrible knee injury happened, which made him miss most of the 2014/15 season, a good part of the following season and almost ended his career. Never heard him complain or demand a transfer, he worked really hard to get back on the pitch and, once he did, he accepted the substitute role to Alex Sandro.