Sluggish Djokovic continues shaking off rust at U.S. Open, comes back to beat Svajda

For the second contest in a row at this U.S. Open, Novak Djokovic appeared a bit sluggish, a bit off, for a stretch. This time, he even dropped the opening set. And then, as always at Flushing Meadows, the 24-time Grand Slam champion progressed to the third round.

Djokovic improved to 36-0 across the first and second rounds in New York, a place he's won four championships, by coming back to beat 145th-ranked American qualifier Zachary Svajda 6-7 (5), 6-3, 6-3, 6-1 at Arthur Ashe Stadium on Wednesday.

"I really tried to soak it in and enjoy the moment, especially when I won the first set," said Svajda, a 22-year-old from San Diego. "It kind of shocked me. I was like, `Wow!"'

THE HUSTLE FROM NOVAK! <a href="https://t.co/kTUDbNugOb">pic.twitter.com/kTUDbNugOb</a>

Asked on court afterward how he felt in his first competition since losing to eventual champion Jannik Sinner in the Wimbledon semifinals on July 11 while hindered by a groin injury, Djokovic replied: "Not that great, to be honest."

Svajda noticed.

At his news conference later, the 38-year-old Djokovic spoke a little more about his mood.

"It's not a motivation thing. It's just like me a bit frustrated with my game, and then I kind of go through stuff internally that — you don't want to know the details what I'm going through and telling myself," he explained after getting to the third round at a major for the 75th time, breaking a tie with Roger Federer for the most such appearances by a man.

"I'm just trying to be locked in. Just trying to solve the riddle once I'm on the court," Djokovic continued. "It's not like I'm not finding joy on the court competing. I enjoy competing, but I don't enjoy not playing well. That's why I put extra pressure on myself and my team