Unflappable so far, Sinner prepares for his first major final. He faces Medvedev in Australia

MELBOURNE, Australia (AP) — One thing people have noticed about Jannik Sinner is how unflappable he's been on his run to the Australian Open final. And the big smile. In the semifinals against 10-time title-winner Novak Djokovic, who had never lost a match after reaching the last...