Xtra Time Web Desk: Novak Djokovic shrugged off concerns about his knee to register a dominant win, while Alexander Zverev also reached the second round. Vit Kopriva offered resistance early in the third set but was unable to subdue second seed Djokovic, who shifted up another gear to run away with the match. Seven-time Wimbledon champion Djokovic eased concerns about his knee with a clinical performance to dismantle Czech qualifier Kopriva 6-1, 6-2, 6-2 on Tuesday and reach the second round.

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"I tried to really focus on the game and not think about the knee too much. Everything that I could do, I have done over the last three weeks along with my team to be able to play here for you today," Djokovic said. "If it was for any other tournament I probably would not have risked it, would not have rushed as much, but I just love Wimbledon, love coming back here.

"I want to thank my surgeon again for doing a great job. Things would be a bit complicated without successful surgery. To be able to play on the highest level and avoid major injuries has been good. I've been fortunate to not be away from the tennis for so long."

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The Serb, searching for a record 25th Grand Slam title to end his title drought this year, broke on his sixth attempt in a marathon fourth game and breezed through the opening set under the Centre Court roof before heaping more pressure on Kopriva. He let out a big roar having grabbed another break in the second set after a 21-shot rally and used it as a springboard to double his advantage in the match, as the 123rd-ranked Kopriva struggled to keep pace with last year's runner-up. The Wimbledon main draw debutant offered resistance early in the third set but was unable to subdue second seed Djokovic, who shifted up another gear to run away with the match.

In a major upset on the women's side, defending champion Marketa Vondrousova crashed out in the opening round on Centre Court. The 25-year-old lost to unseeded Jessica Bouzas Maneiro of Spain in straight sets, 4-6, 2-6, in an hour and 7 minutes. It was the first Grand Slam main draw win for Maneiro, marking a huge milestone in her career.