Alexander Zverev opened his campaign at the ATP Finals in Turin on Monday evening by dispatching Andrey Rublev 6-4, 6-4 in their round-robin opener. In the afternoon match, Casper Ruud romped through the opening set before fighting back from 5-2 behind in the second to beat an out-sorts Carlos Alcaraz 6-1, 7-5. Germany’s Zverev had last faced Russian Rublev at …