Decked out with a new buzz cut, the world no 2 was in sparkling form against towering Reilly Opelka of the US.Carlos Alcaraz is sporting a new buzz cut at the US Open, and while the cropped style is drawing a mixed reaction online, the Spaniard’s spectacular tennis is leaving no room for discussion as he dismantled Reilly Opelka 6-4, 7-5, 6-4 to reach the second round.Having ditched his tousled pretournament look, the second seed made an impressive start on Monday in his quest to secure a second Grand Slam title of the year.“I’ve got to ask the people if they like the new haircut or not. Did you like it, guys? I think they like it,” Alcaraz said on court in response to a question about whether he was moving faster on court with his new look.“Today was a really difficult one,” he added.“He really is a great and a really tough player with that serve. I couldn’t get the rhythm I wanted to get in the match, but I’m really happy with everything.“The return was one of the best things today. I tried to play my best tennis, tried to be focused on the serve. Overall, I had a really great performance today.” Alcaraz plays a forehand return to Opelka during their men’s singles …