Considering all that he is completed during the last two years — two Grand Slam titles and ending final season as No. 1 — Carlos Alcaraz little question belongs among the many world’s elite. Still, this would not have been the ATP Finals debut the 20-year-old Spaniard hoped for as Alcaraz was crushed in his opening match on Monday by two-time champion Alexander Zverev 6-7 (3), 6-3, 6-4.