Zverev's tenure as No. 1 in men's tennis begins with 2nd-round loss to Musetti at Paris Masters

Alexander Zverev's tenure as the No. 1 in men's tennis started with a 7-6 (5), 6-2 defeat to Lorenzo Musetti in the second round of the Paris Masters on Wednesday.Zverev moved to the top ranking on Monday, capping off a fine season which saw him win the first two Grand Slam titles of his career at the French Open and the U.S. Open.Despite playing on a fast indoor court which suited his serve and aggressive ground strokes, the imposing German looked out of sorts against Musetti. The mercurial Italian clinched victory with an ace in a one-sided contest where he had more winners (29-25) and less unforced errors (12-21) than Zverev.Later Wednesday, 24-time Grand Slam champion Novak Djokovic faced qualifier Rinky Hijikata and seven-time major winner Carlos Alcaraz played American Alex Michelsen. Fourth-seeded Daniil Medvedev took on Ignacio Buse.Djokovic needs to reach the semifinals to stand a chance of qualifying for the season-ending ATP Finals later this month. Only two spots remain for