MARIA SHARAPOVA refused to further inflame her row with Serena Williams as she insisted it was time for tennis to come first.

After completing a firstround 7-6 (7/5) 6-3 Wimbledon win over Kristina Mladenovic, talk quickly turned to her relationship with reigning champion Williams.

Sharapova, 26, who made her Wimbledon debut ten years ago and landed the title 12 months later, went on the offensive on Saturday after an article in Rolling Stone magazine quoted Williams as making negative comments about a fellow high-ranked player.

Sharapova suspects the comments were about her, and she returned fire by taking a swipe at Williams’ love life. Williams, in turn, said that she believed clear-the-air talks between the pair at a party in London on Thursday had seen Sharapova accept her apology.

‘‘I’ve said everything that I wanted to say about the issue,’’ Sharapova said. ‘‘Wimbledon started. This is my work. This is my job. I’d really appreciate it if we move on.

‘‘This is one of the most incredible tournaments. This is where all of us work. This is our job. Our job is to go out on the court and work and try to win matches and nothing else. That’s the most important thing to me in my life right now.’’ Fifth seed Sara Errani was smarting at becoming the first major casualty as she was upset by Monica Puig.

Errani, who reached the semi-finals of the recent French Open before losing to Williams, went down 6-3 6-2 to her Puerto Rican opponent.

Victoria Azarenka had an injury scare after hurting her knee in a fall on Court One.

The second seed, who has been a losing semi-finalist in each of the last two years, was a set and a break ahead of Portugal’s Maria Joao Koehler when she fell awkwardly at the back of the court.

It appeared she had suffered a knee injury, but after a long period of treatment the Belarusian ploughed on and clinched a 6-1 6-2 win.

Eighth seed Petra Kvitova was given a minor scare as she was taken to three sets by Coco Vandeweghe, Serbian 12th seed Ana Ivanovic rode out a testing opening set against France’s Virginie Razzano before tying up a 7-6 (7/1) 6-0 win.

Uzbekistan-born American Varvara Lepchenko, seeded 26th, was a casualty as she tumbled to a 6-2 4-6 6-4 loss at the hands of Czech player Eva Birnerova.

Caroline Wozniacki turned on the style in front of the watching Rory McIlroy, her golf superstar boyfriend, as she dropped just two games in seeing off Estrella Cabeza Candela, while Marion Bartoli also made it through.

Exciting teenager Sloane Stephens added further to the hype surround her with a classy dismantling of Jamie Hampton, but she will not be joined in the last 64 by Yanina Wickmayer who lost to Vesna Dolonc, nor by Lucie Hradecka who crashed to defeat against Karin Knapp.

Ukraine’s Lesia Tsurenko was the first player to reach the second round, posting an early 6-1 6-3 victory against Spain’s Lara Arruabarrena- Vecino.